angelina spent $23.65 on books and magazines when she went to chapters. She bought a total of 7 items. The books cost $5.95 each and the magazine cost $2.95 each. How many books and magazines did angelina buy

Answer:

x = 0 and

x = -(5/2)

Step-by-step explanation:

(4x+5)²−25=0
(16x^2+40x + 25) - 25 = 0  [expand the square]

16x^2+40x = 0

8x(2x+5)=0

the roots are 8x=0 and 2x+5 = 0

x = 0 and x = -(5/2)

Answer:

B

Step-by-step explanation:

You solve all until you get the exact expression being found.

(x-7)(x+2) Step.1 ) Distribute Multipliciation

=X^2 +2x -7x -14. Step 2.) Add like terms

=X^2 -5x -14. Step 3.) Solve

Final Answer: B

Answer:

8-5x=-7 , answer is 3hours

Step-by-step explanation:

Start with the current temperature 8 degrees

Then use x to represent the hours of the temperature dropping x

Then set it equal to the temperature you want to reach -7

So 8-5x=-7

To solve get the x alone so subtract 8 form both sides

-5x=-15

And then solve

X=3

Answer:

The rate of change from year 1 to year 2 is - 2%.

The rate of change from year 9 to year 10 is -0.02%

The rate of change will be the same for all years.

Step-by-step explanation:

While this seems an unlikely answer (why would the rate reamin the same every year?), it is the correct answer since we are told that one equation is valid for t years.  With no other information, we must conclude the rate of change remains the same every year.  The actual number by which the population shrinks is changing, but the rate remains the same.

The function P(t) = 227,000(.98)^t says that the initial population in year 0 is 227,000 [227,000(0.98)^0 = 227,000].  The factor (0.98) is the result of the expression (1-(0.02)^t).  The 1 is the factor for the initial population and the -0.02 is the fraction of 1 by which the population declines each year (2%).

Initial population = 227,000 [227,000(0.98)^0 = 227,000

Year 1 population would be (227,000)*(1-0.02)^1 or (227,000)*(0.98)

Year 2 population would be (227,000)*(1-0.02)^2 or (227,000)*(0.98)^2

Year 9 population would be (227,000)*(1-0.02)^9 or (227,000)*(0.98)^9

Year 10 population would be (227,000)*(1-0.02)^10 or (227,000)*(0.98)^10

The change is the same every year (0.98).

Answer:

Step-by-step explanation: 80

Answer: THE ANSWER IS 28%

worked it out on the calculator in the end

Step-by-step explanation:

Answer: To find the distance a person can see to the horizon when they are 1,000 feet above sea level, we can substitute h = 1000 into the formula d = radical 3h/2

d = radical 3(1000)/2 = radical 3(1000*2) = radical 6000

d = radical 6000 = 77.46 miles

So if a person is 1,000 feet above sea level, they can see 77.46 miles to the

Step-by-step explanation:

method of least squares is  not a measure of central tendency which is not involved in the typical measures.

The central tendency of the dataset are defined as  three important measures namely mean, median and mode. The mean shows the average value of the dataset. which can be calculated as the sum of all the values in the dataset which are  divided by the number of values. and  it is considered as the arithmetic mean. Some  of the other measures of mean which is  used to find the central tendency are as mentioned as:

Geometric Mean , Harmonic Mean ,Weighted Mean.

Median is the middle value of the dataset in which the it  is arranged in the ascending order or in descending order. When the dataset  which contains an even number of values, then the median value of the dataset can be calculated by taking the mean of the middle two values.

The mode shows  the frequently occurring value in the dataset. Sometimes the dataset are arranged and which contain multiple modes and in some situations , it does not contain any mode at all.

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The person must leave the money for 4 years and 8 months  in the bank until it reaches 5100 dollars.

Compound interest is computed as interest on the principle of an account plus any accrued interest.

Compound interest can be calculated using the following formula:

x = P (1+r/n[tex])^{nt}[/tex]

,where x = compound interest

P = principal (the initial deposit or loan amount)

r = annual interest rate

n = the number of compounding periods per unit of time

t = the number of time units the money is invested or borrowed for

Given:

A person invests 4000 dollars in a bank.

The bank pays 5.25% interest compounded monthly.

First, convert R as a percent to r as a decimal

r = R/100

r = 5.25/100

r = 0.0525 per year,

Then, solve the equation for t,

t = ln(A/P) / n[ln(1 + r/n)]

t = ln(5,100.00/4,000.00) / (12 × [ln(1 + 0.0525/12)])

t = ln(5,100.00/4,000.00) / (12 × [ln(1 + 0.004375)])

t = 4.638 years

t = 4 years and 8 months.

Therefore, the time is 4 years and 8 months.

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A quadratic equation in algebra is any equation that can be written in standard form as where x stands for an unknown value, a, b, and c stand for known numbers, and where a 0.  If x + 20 = 0, then x must be -20.

A quadratic equation in algebra is any equation that can be written in standard form as where x stands for an unknown value, a, b, and c stand for known numbers, and where a 0. Length + breadth equals the area of a rectangle. The length is 8 feet greater than the breadth in this instance since we are aware that it is 8 feet longer than its width. We may therefore write the length as x+8 if the width is x.

We may now express length and width as x•(x+8). We get x2 + 8x after multiplying.

We know that the area is 240 square feet but also that it is equal to x2 + 8x. So, x2 + 8x = 240. To get the equation, take 240 away from both sides.

x2 + 8x - 240 = 0.

The equation must now be solved. This can be accomplished by factoring, by applying the quadratic formula, or by solving the square. By factoring, I will demonstrate:

The formula for factoring x2 + 8x - 240 is (x + __)(x + ). The integers must be multiplied by -240 and added to equal 8.

Following are some number pairs that add up to -240:

Because they both sum up to 8, the numbers -12 and 20 are the ones we seek. -12•20 = -240, and -12 + 20 = 8.

We can factor x2 + 8x - 240 as (x - 12)(x + 20) as a result. Set each component to 0 in order to solve.

If x - 12 = 0, then x must equal 12.

If x + 20 = 0, then x must be -20.

The answers to the problem are 12 and -20, but neither of them makes sense. The solution -20 does not work since a rectangle's width cannot be negative. The width being 12 is the only answer that makes sense in this situation.

Consider what kind of form "width" is when choosing the units for width. 'Width' is a line. You use basic units, not squared or cubed units, for lines. The width measurement is therefore in feet.

The complete question is.

A regular plot of land has an area of 240 square feet and is 8 feet longer than its width....

a) Write a quadratic equation in the form ax2 + bx + c = , whose solution gives the width of the rectangular plot of land.

The equation for the width is blank (Type an equation. Type your answer in standard form)

b) Solve the equation.

The solution(s) to the quadratic equation found in part a is/are x =

(Type an integer or a simplified fraction. Use a comma to separate answers as needed)

The width of the plot is blank (ft3, ft2, or ft?

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A good sampling method for this scenario would be a probability-based method called Simple Random Sampling.

In Simple Random Sampling, each individual from the population of individuals who have high cholesterol has an equal chance of being selected for the sample. This ensures that the sample is representative of the population and that each individual in the population has a known non-zero probability of being selected.

This method can be supported by the fact that it is easy to implement, and it does not require any prior knowledge of the population characteristics. It also ensures that the sample is unbiased and has a good chance of being representative of the population.

Additionally, Simple Random Sampling is also a cost-effective sampling method as it is less expensive and time-consuming than other sampling methods such as stratified random sampling or cluster sampling.

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The result for the division of the fractions in this problem is given as follows:

[tex]\frac{x^3 + 6x^2 + 7x + 18}{(x - 3)(x + 9)(x^2 - 9)}[/tex]

The division of two fractions is given by the multiplication of the first fraction by the inverse of the second fraction.

The first fraction in this problem is composed by the sum of two fractions, as follows:

[tex]\frac{x + 5}{x + 9} + \frac{x + 7}{x^2 - 9}[/tex]

Applying the subtraction of perfect squares, we have that:

x² - 9 = (x - 3)(x + 3).

The second fraction is given as follows:

(x² - 9)/(x + 3).

Considering the factoring of x² - 9, the second fraction is given as follows:

x - 3.

Hence the inverse is of:

1/(x - 3).

Then the entire quotient is given as follows:

[tex]\left(\frac{x + 5}{x + 9} + \frac{x + 7}{x^2 - 9}\right) \times \frac{1}{x - 3}[/tex]

The addition of the two fractions is given as follows:

[tex]\frac{(x + 5)(x^2 - 9) + (x + 7)(x + 9)}{(x + 9)(x^2 - 9)} = \frac{x^3 + 6x^2 + 7x + 18}{(x + 9)(x^2 - 9)}[/tex]

Applying the multiplication by x - 3 in the denominator, the quotient is given as follows:

[tex]\frac{x^3 + 6x^2 + 7x + 18}{(x - 3)(x + 9)(x^2 - 9)}[/tex]

The problem asks for the quotient between the two fractions.

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The function that represents the total cost for the number of gigabytes is; C(x) = 50x

Some of the steps to writing a system of linear equations from word problems are;

1) Understand the problem like the words used in stating the problem and what exactly you are trying to find.

2) Translate the problem to an equation by assigning a variable (or variables) to represent the unknown.

3) Carry out the plan and solve the problem.

We  are told that her budget is $50 a month. Therefore this is like the rate for each gigabyte and if the number of gigabytes is denoted as x, then the function of the total cost is;

C(x) = 50x

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Option D)  The slope of the line that contains the points (2, -8) and (-4, 4) is -2

A line's slope is how steeply it slopes from LEFT to RIGHT. The slope of a line is determined by dividing its rise, or vertical change, by its run, or horizontal change.

Any two different points on a line may be used to compute the slope of any line. The ratio of "vertical change" to "horizontal change" between two different locations on a line is calculated using the slope of a line formula.

The increase divided by the run, or the ratio of the rise to the run, is known as the line's slope. In the coordinate plane, it describes the slope of the line. Finding the slope between two separate locations and calculating the slope of a line are related tasks. In general, we require the values of any two separate coordinates of a line in order to determine its slope.

Slope is give by 2 points on a line is [tex]\frac{y\x_{2}- y\x_{1} }{x_{2}-x_{1}}[/tex]

so the slope is

[tex]\frac{4 - (-8)}{-4 - 2} = \frac{12}{-6} = -2[/tex]

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We select every fifth invoice in a file is systematic sampling.

'What is systemic sampling?'

Systematic sampling is a probability sampling technique where researchers choose individuals from the population at predetermined intervals (or k).

This method will provide you with a representative sample that can be utilized to make inferences about your community of interest if the population order is random or random-looking (for example, alphabetical).

Simple random sampling has numerous advantages over systematic sampling in terms of randomization, but systematic sampling is a little bit simpler to carry out. Similar to basic random sampling, systematic sampling can be used using a list of every member of the population. Contrary to simple random sampling, however, you can also utilize this strategy if you don't have access to a list of your population in advance.

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The value of the double integral of the expression is 2/15.

The term integral in math is defined as a method of adding or summing up the parts to find the whole and it is basically used to find the volume, area and the central values of many things.

Here we have given the expression that can be written as

=> [tex]\int_{1}^{-1}\int_{0}^{\sqrt{1-y^{2}}}xy^2dxdy[/tex]

When we integrate the equation, then we get the simplified form as follows:

=>[tex]\int_{1}^{-1}\mathrm{[\frac{x^2y^2}{2}]}_{0}^{\sqrt{1-y^2}}[/tex]

Here we have to apply the values on the expression then we get the resulting expression as,

=>[tex]\frac{1}{2}\int_{1}^{-1}(y^2-y^4)dy[/tex]

Now, we have to Integrate with respect to y, then we get the expression as follows:

=>[tex]\frac{1}{2}\mathrm{[\frac{y^3}{2} - \frac{y^5}{5}]}_{-1}^{1}[/tex]

Then the resulting value of double integral is written as,

=> 2/15

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On solving the provided question, we can say that by unitary method 14 more hours must she work to earn an additional 154 dollars

The unit technique is an approach to problem-solving that involves first determining the value of a single unit, then multiplying that value to determine the required value. The unit method, to put it simply, is used to extract a single unit value from a supplied multiple. For instance, 40 pens would cost 400 rupees, or the price of one pen. The process for doing this may be standardized. a single country. anything that has an identity element. (mathematics, algebra) (Linear algebra, mathematical analysis, mathematics of matrices or operators) Its adjoint and reciprocal are equivalent.

here,

jessie worked = 22 hours last week at the auto shop

shop and earned = 242 dollars

1 hour = 242/22

154 dollars = 22/242*154 = 0.0909090909 * 154 = 13.9999999986 = 14 hours

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Dan paid for 2 shirts and 2 pairs of trousers will be shs 1300.

The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.

The cost of 7 shirts and 3 pairs of trousers is 2950 while that of 5 pairs of trousers and 3 shirts is less by 200.

Let 'x' and 'y' be the cost of a shirt and trousers, respectively. Then the equations are given as,

7x + 3y = 2950                ....1

5y + 3x = 2950 - 200

3x + 5y = 2750               ....2

Multiply equation 1 by 5 and equation 2 by 3, then we have

35x + 15y = 14750       ...3

9x + 15y = 8250          ...4

Subtract equation 4 from equation 3, then we have

35x - 9x = 14750 - 8250

26x = 6500

x = 250

Then the value of 'y' is given as,

3(250) + 5y = 2750

750 + 5y = 2750

5y = 2000

y = 400

Then Dan pay for 2 shirts and 2 pairs of trousers will be given as,

⇒ 2 x 250 + 2 x 400

⇒ 500 + 800

⇒ 1300

Dan paid for 2 shirts and 2 pairs of trousers will be shs 1300.

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Answer:

Algebra 2 typically builds on the concepts covered in Algebra 1 and introduces more advanced topics such as:

Quadratic equations and functions

Complex numbers

Polynomial functions and their operations

Rational functions and their operations

Conic sections

Exponential and logarithmic functions

Sequences and series

Trigonometry

Matrices and determinants

Permutations and combinations

Probability

Functions and relations

Limits and derivatives

Answer:

rrtgf thing for them code mine took also

3

Step-by-step explanation:

tutfd

The length and breadth of a rectangle with an area of 2 square feet and a perimeter of 9 feet are 4 feet and 0.5 feet, respectively.

The size of a region on a surface is measured in area. Surface area refers to the area of an open surface or the border of a three-dimensional object, whereas area of a plane region or plane area refers to the area of a form or planar lamina. The total space occupied by a flat (2-D) surface or the form of an item is defined as its area. Draw a square on a sheet of paper using a pencil. It is a two-dimensional figure. The area of the form on the paper is referred to as its Area. Consider your square to be made up of smaller unit squares.

Here,

area=2

perimeter=9

lw=2

w=2/l

2l+2w=9

2l+2*(2/l)=9

2l+4/l=9

2l²+4=9l

2l²-9l+4=0

2l²-8l-1l+4=0

2l(l-4)-1(l-4)=0

(2l-1)(l-4)=0

l=1/2, 4

l=4 feet

w=2/l

w=2/4

w=0.5 feet

l²+w²=4²+(0.5)²

=16.25

The length and width of rectangle whose area is 2 square feet and perimeter as 9 feet is 4 feet and 0.5 feet.

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The cost of one hamburger meal  is $10 and the  cost of one hot dog meal is $6.

The first step is to form a system of equations using the information in the question:

a + 3b = 36 equation 1

2a + 2b = 32 equation 2

Where:

a = cost of one hot dog meal

b = cost of one hamburger meal

The elimination method would be used to determine the cost of each meal

Multiply equation1 by 2

2a + 6b = 72 equation 3

Subtract equation 2 from equation 3

4b = 40

Divide both sides of the equation by 4

b = 40 / 4

b = 10

Substitute for b in equation 1:

a + 3(10) = 36

a + 30 = 36

a = 36 - 30

a = 6

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On solving the provided question, we can say that Slope is 1/2, so  equation is y=1/2x+0 or y=1/2x.v

An equation is a mathematical formula that connects two assertions using the equal sign (=) to denote equivalence. In algebra, an equation is a mathematical statement that establishes the equivalence of two mathematical expressions. For instance, an equal sign separates the components 3x + 5 and 14 in the equation 3x + 5 = 14. A mathematical formula is used to explain the connection between two sentences on either side of a letter. Frequently, there is just one variable, which is also the symbol. for example, 2x - 4 = 2.

We can utilize the slope-intercept version of the equation. It is written as y=mx+b. B is the y-intercept, and m stands for the slope. The line intersects the y-axis at (0,0). the y-intercept is consequently 0.

the slope by equation, we have

m = y2 - y1 / x2 - x1

m = 2-1/4-2

m = 1/2

Slope is 1/2, so  equation is y=1/2x+0 or y=1/2x.

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The correct question is

Find the equation of the line. Use exact numbers. y=y=y, equals x+x+x, plus 5

a) The random variable in this problem is the number of left-handed people in a grouping of 15 people.

x = number of left-handed people in a group of 15 people

b) This is a binomial experiment because it meets the following criteria:

The experiment consists of a fixed number of trials (15 people in this case)

Each trial has two possible outcomes (left-handed or not left-handed)

The probability of success (left-handed) is constant for each trial (10% or 0.1)

c) To find the probability that none are left-handed, we use the binomial probability formula:

P(x = 0) = (15 choose 0)(0.1)^0(0.9)^15 = 0.3429

d) To find the probability that seven are left-handed, we use the binomial probability formula:

P(x = 7) = (15 choose 7)(0.1)^7(0.9)^8 = 0.1540

e) To find the probability that at least two are left-handed, we need to find the probability of getting 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 left-handed people, and add them up. We can use the binomial probability formula to find the probability of getting each of these values of x, and add them up to find the total probability:

P(x ≥ 2) = P(x = 2) + P(x = 3) + P(x = 4) + ... + P(x = 15)

f) To find the probability that at most three are left-handed, we need to find the probability of getting 0, 1, 2, and 3 left-handed people, and add them up. We can use the binomial probability formula to find the probability of getting each of these values of x, and add them up to find the total probability:

P(x ≤ 3) = P(x = 0) + P(x = 1) + P(x = 2) + P(x = 3)

g) To find the probability that at least seven are left-handed, we need to find the probability of getting 7, 8, 9, 10, 11, 12, 13, 14, and 15 left-handed people, and add them up. We can use the binomial probability formula to find the probability of getting each of these values of x, and add them up to find the total probability:

P(x ≥ 7) = P(x = 7) + P(x = 8) + P(x = 9) + ... + P(x = 15)

h) The mean of x is given by:

E(x) = 15(0.1) = 1.5

i) The variance of x is given by:

Var(x) = 15(0.1)(0.9) = 1.35

j) The standard deviation of x is given by:

SD(x) = √1.35 = 1.16

So, the mean of x is 1.5 and the standard deviation is 1.16. The probability of getting at least 2 left-handed people is 0.717, the probability of getting at most 3 left-handed people is 0.547 and the probability of getting at least 7 left-handed people is 0.0256.

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The total amount deposited is $300.

percentage, a relative value indicating hundredth parts of any quantity.

Given that rate of interest for 5 years is 2.5 and the interest is 2400

We have to find the  total amount deposited.

Simple interest=PNR/100

Principal P=2400Rs

Rate =2.5 per annum

N=time in year=5

Now plu in the value in the formula.

simple Interest=2400×2.5×5/100

=300

Hence, 300 is the amount which is deposited.

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Answer: 1680 ft

Step-by-step explanation:

See attachment

The dimensions of the rectangular plot that require the least amount of fencing is :

A(17.32, 17.32) = 600

P(17.32, 17.32) = 121.24

Now, According to the question:

Optimization using Derivatives:

Suppose the function F(x) has continuous first- and second-order derivatives, F′(x) and F″(x).

At a point x=c in the domain of F(x), the function:

600 [tex]u^2[/tex] of land to be enclosed by fence

Area inside plot should be maximized, amount of fence should be minimized

If we draw a quick sketch, we get something like this:

_____ _____

|        |         |

|        |         |

|        |         |

|        |         |

The two rectangles could be different sizes but if one rectangle size maximizes area then it would make sense to use that some rectangle for both sides.

Let's put some variables into our picture so we can define our constraints.

       y        y  

  |         |        |

x |      x |      x |

  |         |        |

  |         |        |

Now we just need an equation to connect our unknowns (how much fence to use) to our constraint (it has to have an exact area of 600 u^2.

A = x × 2y = area = 600

P = 3x + 4y = perimeter = a minimum

First we solve the area equation for y:

y = [tex]\frac{600}{2x}[/tex] = [tex]\frac{300}{x}[/tex]  

and then we substitute that result into our perimeter equation:

P = 3x + 4 (300/x)

P = 3x + 1200/x

Our perimeter equation is: P(x) = 3x + 1200/x OR P(x) = 3x +1200[tex]x^-^1[/tex]

We can find what value of x makes our perimeter as small as possible (a minimum) by graphing or by using Calculus.

In Calculus we know that maximums and minimums always occur when the derivative is zero. This is because the slope (rate of change) at these points in a graph are always flat or zero. Our derivative is

P'(x) = 3 - 1200[tex]x^-^2[/tex]

When set equal to zero, we can solve for x:

3 - 1200[tex]x^-^2[/tex]= 0

1 - 400[tex]x^-^2[/tex] = 0

1 = 400/[tex]x^{2}[/tex]

[tex]x^{2}[/tex] = 400

x = ± 20

Our fence length can't be a negative number so our answer must be 20u.

If our x length is 20, then our y length must be 300/x to ensure our area is 600 u^2.

The y length is 300/(20) = 15

Let's put all of our numbers into our picture to see if it make sense.

      15      15    

    |        |         |

20 |    20 |    20 |

    |        |         |

    |        |         |

       15      15

Sure enough our area is 600.

Here's what we have right now:

A(20, 15) = 600

P(20, 15) = 120

How about we try something a little bigger like 20.5 for x and 14.63 for y?

A(20.5, 14.63) = 600

P(20.5, 14.63) = 120.02

How about we try something a little smaller like 19.5 for x and 15.38 for y?

A(19.5, 15.38) = 600

P(19.5, 15.38) = 120.02

It looks like if we try to change x, even a little, to make it bigger or smaller the perimeter only gets bigger.

You might have guessed at the beginning that a square is the best shape to use to maximize area, so let's try that as well.

Each rectangle is 300[tex]u^2[/tex]. We want a square so each side would be √(300) = 17.32

              17.32         17.32    

        |                |                 |

17.32 |       17.32 |        17.32 |

        |                |                 |

             17.32          17.32

A(17.32, 17.32) = 600

P(17.32, 17.32) = 121.24

Hence, The dimensions of the rectangular plot that require the least amount of fencing is :

A(17.32, 17.32) = 600

P(17.32, 17.32) = 121.24

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The formula of lateral area of a cone can be equivalent to the formulas:

LA = r√(r^2 + h^2) and

LA = πrl

The formula for the lateral area of a right cone is LA = rs, where r is the radius of the base and s is the slant height of the cone.

The slant height (s) of a cone is the distance from the apex of the cone to the center of the base along a line that is perpendicular to the base and passes through the apex. The slant height of a cone can be found using the Pythagorean theorem using the radius (r) and the height (h) of the cone:

s = √(r^2 + h^2)

So, the formula for lateral area of a cone can be equivalent to the formula:

LA = r√(r^2 + h^2)

Another equation that is equivalent to the lateral area formula is

LA = (1/2)(2πr)(l)

LA = πrl

where l is the slant height of the cone.

This is because the lateral area of a cone is equal to (1/2) of the circumference of the base multiplied by the slant height, and we know that the circumference of a circle is equal to 2πr.

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Answer:

Step-by-step explanation:

1. What stock did you buy?

Apple Inc.

2. Why did you think buying this stock would be a good idea?

Apple products are becoming more and more popular every day. The company is always introducing new and exciting devices. I knew it would be a safe choice to invest in.

3. How much would you have made or lost on an investment of $1,000?

I would have made $105.

Hint: First find out how many shares you could've bought one year ago by dividing $1,000 by the price of the stock one year ago today. You may have to estimate the stock price from the graph. Round the number of shares to the nearest whole number. Then, find out the current value of your shares by multiplying the number of shares you bought by the price of the stock today. Compare that to your initial investment of $1,000.

4. Could you have made more money by selling sooner?

Yes, on October 3, 2018 it was at its peak for the year.

your investment would be doing great today. you would make $115 from the given investment.

A stock usually referred to as equity, is a type of investment that denotes ownership in a portion of the issuing company. Shares, also known as units of stock, entitle their owners to a share of the company's assets and income in proportion to the number of shares they possess.

Given, you're going to imagine that you invested $1,000 in a company one year ago

Therefore, Today, your investment would be flourishing. Your return on the stated investment would be $1,115.

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Joe moves along at a speed of 2.5 km/h.

Speed is what it means. the speed at which an object's location changes in any direction.

The distance traveled in relation to the time it took to travel that distance is how speed is defined.

Since speed simply has a direction and no magnitude, it is a scalar quantity.

So, calculate walking speed of Joe as follows:

Jill covers 9 kilometers in 3 hours while moving at a 3-kilometer-per-hour pace.

Joe covers 7.5 kilometers in 3 hours while walking at a speed of x miles per hour.

Applying the formula, D = R * T.

We can determine Joe's rate by replacing D, which is 7.5 kilometers, and T, which is 3 hours:

7.5 = R * 3

Both sides by 3: Divide

R = 2.5

Therefore, Joe moves along at a speed of 2.5 km/h.

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Correct question:

Jill is 16.5 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill is 16.5 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill is walking 3 kilometers per hour. They meet in 3 hours. How fast is Joe walking?

Answer:

distance from beginning is 225 and the change is -65 per hour

Step-by-step explanation:

The fraction is  :

[tex]\frac{x+3}{3} =\frac{y+2}{2}[/tex] then :[tex]\frac{x}{3} = \frac{y}{2}[/tex]

The correct option is (c).

Now, According to the question:

The given fraction is :

[tex]\frac{x+3}{3} =\frac{y+2}{2}[/tex]

To solve the above fraction and find x/3 =?

We can solve this by cross-multiplying.

Since [tex]\frac{x+3}{3} =\frac{y+2}{2}[/tex] ,we can cross-multiply both sides of the equation to remove the denominators.

Multiple the right side by 2 and the left side by 3 to get 2(x+3)=3(y+2).

Distribute to get the x on one side. 2x+6=3y+6.

The 6s on both sides cancel out so we are left with

2x=3y.

Divide both sides by 2 to get x on one side, so x= 3y/2

The question asks for x/3,

so we can divide both sides of the equation to get:

[tex]\frac{x}{3} = \frac{3y}{6}[/tex]

Simplify, We get:

[tex]\frac{x}{3} = \frac{y}{2}[/tex]

Hence, (c) is the correct answer.

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