John can mow his lawn in 3 hours and his sister, Julie, can mow it in 2 hours. How long will it take them to mow their lawn if they work together?
A. 1 hour 12 minutes
B. 1 hour 15 minutes
C. 1 hour 20 minutes
D. 1 hour 30 minutes
E. 1 hour 35 minutes

The numeric value of the function f(x) = 4x² + 2x + 2 at x = x + 2 is given as follows:

f(x + 2) = 4x² + 20x + 22.

To find the numeric value of a function or of an expression, we replace each instance of the variable in the function or in the expression by the value at which we want to find the numeric value.

The function for this problem is defined as follows:

f(x) = 4x² + 2x + 2

To obtain the numeric value at x = x + 2, we replace the two instances of x by x + 2, hence:

f(x + 2) = 4(x + 2)²  + 2(x + 2) + 2

f(x + 2) = 4(x² + 4x + 4) + 4x + 4 + 2

f(x + 2) = 4x² + 16x + 16 + 4x + 6

f(x + 2) = 4x² + 20x + 22.

The problem asks for the numeric value of the function f(x) = 4x² + 2x + 2 at x = x + 2.

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The mean of the score is 3.4 and the standard deviation is 3.2.

Scores of students = 5, 4, 4, 3 and 1

When determining the mean of a group of numbers, add up all the numbers and divide by the total number in the group.

Calculating the mean -

= Sum of total values / Total values

= 5 + 4 + 4 + 3 + 1 / 5

= 17/5

= 3.4

By averaging the squared deviations of each integer from the mean, you may get the variance before calculating the standard deviation.

Calculating the Standard deviation -

σ = √ ∑ (xi - u)²/n

σ² = (1² + (3.4 - 1)² + (3.4 - 4)² + (3.4 - 4)²+ (3.4 - 5)²) / 5

= 3.2

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Answer:

Step-by-step explanation:

Yes, the constant of proportionality is 0.3.

Answer:

Yes, the constant of proportionality is 0.3.

Step-by-step explanation:

12-ounce cup costs $3.60 => 1 ounce = $3.60 / 12 = $0.3

16-ounce cup costs $4.80 => 1 ounce = $4.80 / 16 = $0.3

$0.3 = $0.3

Yes, the constant of proportionality is 0.3.

Answer:

the actual size is 24 cm

Step-by-step explanation:

first, the problem tells us that the picture is only 1/8th of the original. the easiest way to find this is by thinking about the fact that we only have 1 out of 8 parts. each of these parts are going to be the exact same size.

each of the 8 parts is going to equal 3cm. so multiply 3 cm by your 8 parts.

3*8=24

this will give you the size of your entire bottle.

The probability that both of them wear glasses is 35%.

The probability that both students wear glasses is equal to the product of the probability of the first and the second student wearing glasses

If 59% of all students on campus wear glasses, then the probability of a single student wearing glasses is 0.59.

The probability that both students wear glasses is:

0.59 * 0.59 = 0.3481

Approximate

0.59 * 0.59 = 0.35

So, the probability that both students wear glasses is approximately 0.35 or 35%.

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Yes , it is a  average rate of change over the interval -1

What is average rate of change?

It is a measure of how much the function changed per unit, on average, over that interval. It is derived from the slope of the straight line connecting the interval's endpoints on the function's graph.

suppose function y = x+1

then at interval [ -1 , 1]

at x= -1

y= 0

and at x= 1

y= 2

Rate of change = (y2 - y1)/(x2 - x1) = (2-0) / -1-1

Rate of change = 2/-2

= -1

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The number of Mia's marbles that show some blue colour would be = 214.3 marbles

A fraction of a number is part of the whole number which is represented as a numerator and a denominator.

The total number of marbles = 250

The fraction of the marble that are red = 2/3

The fraction of the marble that are blue = 6/7

The fraction of the marble that are yellow = 3/4

The quantity of marbles that are blue

= 6/7× 250

= 1500/7

= 214.3 marbles

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Asymptotes and extreme values of the equation 10n3 + 8n - 4 are none, slope of 4n+3 is 4, and n is an integer.

( a ) Points of axis interception at 4n+3: X Intercepts: [tex]$\left(-\frac{3}{4}, 0\right), \mathrm{Y}$[/tex] Intercepts: (0,3)

Slope of 4 n+3:  m=4

( b ) Domain of [tex]$10 n^3+8 n-4:\left[\begin{array}{cc}\text { Solution: } & -\infty < n < \infty \\ \text { Interval Notation: } & (-\infty, \infty)\end{array}\right]$[/tex]

Range of [tex]$10 n^3+8 n-4:\left[\begin{array}{cc}\text { Solution: } & -\infty < f(x) < \infty \\ \text { Interval Notation: } & (-\infty, \infty)\end{array}\right]$[/tex]

Points of axis interception at  [tex]$10 n^3+8 n-4: \quad X$[/tex] Intercepts: [tex]$(0.41235 \ldots, 0), Y$[/tex] Intercepts: (0,-4)

Asymptotes of [tex]$10 n^3+8 n-4: \quad$[/tex] None

Extreme Points of [tex]$10 n^3+8 n-4: \quad$[/tex]None

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Asymptotes and extreme values of the equation 10n3 + 8n - 4 are none, slope of 4n+3 is 4, and n is an integer.

( a ) Points of axis interception at 4n+3: X Intercepts:  Intercepts: (0,3)

Slope of 4 n+3:  m=4

( b ) Domain of

Range of

Points of axis interception at   Intercepts:  Intercepts: (0,-4)

Asymptotes of  None

Extreme Points of None

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Answer:

15,910

Step-by-step explanation:

(390*26)+5770=15910

On solving the provided question, we cans ay that in the equation 390t + 5770, In the year 2021, the total average credit card debt for a U.S.

household will be 5,910 dollars.

A mathematical equation is a formula that joins two statements and uses the equal symbol (=) to indicate equality. A mathematical statement that establishes the equality of two mathematical expressions is known as an equation in algebra. For instance, in the equation 3x + 5 = 14, the equal sign places the variables 3x + 5 and 14 apart. The relationship between the two sentences on either side of a letter is described by a mathematical formula. Often, there is only one variable, which also serves as the symbol. for instance, 2x – 4 = 2.

in the equation 390t + 5770

t = 26

In the year 2021, the total average credit card debt for a U.S.

household will be 5,910 dollars.

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The marks of the pupil who was recently added is 3.

Given is that overall mark for english test for 15 pupils is 82. If one more pupil being added, the overall mark become 85.

For 15 peoples, the overall mark for english is 82. When one more person is added, the overall mark become 85. Then, the marks of the pupil who recently added was -

85 - 82

3

Therefore, the marks of the pupil who was recently added is 3.

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When applying the some rule, we only combine two equal ratios at once. Consequently, we deal with pairs of sides and angles that have equivalent ratios.

When two ratios are equal, a percentage is formed; alternatively, two equal ratios can be said to produce a proportion. When we understand that two ratios are equal, you can write a proportion. The ratios of these two numbers are equal.

When two variables are correlated in a manner that their ratios are equal, this is known as a proportional relationship. In a proportional connection, one variable is always a constant value multiplied by the other, which is another way to think of them. The "constant of proportionality" is the term used to describe that constant. Two angles are said to be complimentary if their sum is 90 degrees. Alternatively put, two angles are said to be complimentary if they combine to make a right angle.

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the answer is 3 because if you add those together you will get 3

The ratio of the sides of the triangle is the same one angle therefore, the two of the given triangles are similar triangles.

What are similar triangles?

If the respective angles are congruent and the corresponding sides are proportional, two triangles are said to be similar. To put it another way, comparable triangles are similar in shape but not necessarily in size. In addition, the triangles are congruent if their corresponding sides are of identical length.

As it we know that for the two triangles to be similar triangles, the ratio of their corresponding sides should be the same.

DC/RD = DB/SD

∠R = ∠C = 68°

So, ΔDCB ≈ ΔRSD by Side Angel Side property.

Hence, we can see that the ratio of the sides of the triangle is the same one angle therefore, the two of the given triangles are similar triangles.

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The independent variable x represents the, work hour and the dependent variable is money she earned, Because the money (dependant) depends on the work hour (Independent).

One whose value is dependent on another variable is said to be a dependent variable. Its quantity depends on the other, as the name would imply. Dependent variables are subject to external influences and do not change independently.

Independent variables don't rely on other factors, as opposed to dependent variables. Their individualistic values are what changed the dependent variables, and this is what caused the change. Independent variables are, once more, unaffected by external factors, as their name implies.

Because the money she earn id depended on the number of hour she work,

(x) =  8x

When x = 5

5 = 8 × 5

      = $40

Thus, Naomi is making $40 per 5 hours when she is babysitting her younger siblings.

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Full question:

Answer:

Solution in attached photo.

Step-by-step explanation:

Steps are in attached photo, to do dot product, make sure you are multiplying x-coordinates of one vector with x-coordinates of another vector, and likewise for y-coordinates.

The Mean is 350 and Median is 383.3

The first step in calculating the mean of grouped data is to establish the midpoint (also known as a class mark) of each interval or class. The frequencies of the relevant classes must then be multiplied by these midpoints. The mean value is determined by dividing the total number of values by the sum of the products.

Given:

 CI                  F        x        d       Fd        cf

100 - 200 2 150     -2       4   2  

200 - 300 2 250     -1       -2   4  

300 - 400 3 350      0       0   7  

400 - 500 6 450       1       6   13

                     n= 13                              

Mean = 350+ 0/13 x 100

Mean = 350+0

Mean = 350

Hence, the Mean is 350 and Median is 383.3

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The solution to 3x + 2(4 + 6x) = 113 is x=7

3x + 2(4 + 6x) = 113

We will multiply the 2 with the brackets

3x+8+12x=13

adding the coefficients os x together

15x+8=113

adding -8 on both the sides

15x=105

dividing both the sides by 15

x=105/15

after division we get

x=7

To check our solution

we first put value of x in our original equation

3x7 + 2(4 + 6x7) = 113

we simplify the equation

21+2(4+42)=113

According to BODMAS we first solve the bracket

21+2(46)=113

now we solve the multiplication part

21+92=113

solving this

113=113

∴ LHS=RHS

Hence the solution is correct.

Therefore, the solution to 3x + 2(4 + 6x) = 113 is x=7

BODMAS is an acronym used to remember the order of precedence for operations. It stands for Brackets of Order(exponents) Division, multiplication, Addition, Subtraction

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Part A: the number of cucumbers is 11.

Part B: the number of avocados is 8.

Part A:

Let x is the number of cucumbers .

Then,

3x - 7 = 26,

3x = 26+7,

3x = 33,

x = 33/3,

x = 11.

Thus, the number of cucumbers is 11.

Part B:

Let x is the number of avocados.

3x - 7 = x + 9

3x - x = 9 + 7

2x = 16

x = 8

Thus, the number of avocados is 8.

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To calculate y, we use the sum() function with an argument of x < 5 to count the number of entries in x that are strictly less than 5. To calculate z, we use the sum() function with an argument of (x > -5) & (x < 5) to count the number of entries in x that are both greater than -5 and less than 5.

y = sum(x < 5)

z = sum((x > -5) & (x < 5))

y = sum(x < 5)

 = sum(TRUE, FALSE, FALSE, TRUE, FALSE, FALSE, TRUE, FALSE, TRUE, TRUE, TRUE, FALSE)

 = 5

z = sum((x > -5) & (x < 5))

 = sum(TRUE, FALSE, FALSE, TRUE, FALSE, FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE)

 = 4

The first variable, y, is the number of entries of x that are strictly less than 5. To calculate y, we can use the sum() function with an argument of x < 5. This will count the number of entries in x that are less than 5. For example, if

x <- c(-5, 7, 9, 3, 14, 9, 5, 10, 2, -2, 0, 12), then y will be equal to 6 because there are 6 entries in x that are strictly less than 5.

The second variable, z, is the number of entries of x that are strictly between -5 and 5. To calculate z, we can use the sum() function with an argument of (x > -5) & (x < 5). This will count the number of entries in x that are both greater than -5 and less than 5. For our example, z will be equal to 4 because there are 4 entries in x that are strictly between -5 and 5.

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The solution set of the linear equation 2x - t.6.t-12 = 0 can be represented parametrically as x = t + 6.

A linear equation is an algebraic equation of the form y=mx+b. m is the slope and b is the y-intercept. The above is sometimes called a "linear equation in two variables" where y and x are variables.

The equation 2x - t.6.t-12 = 0 is a linear equation in the variable x and can be solved by isolating x to one side of the equation. To do this, first distribute t on the right side of the equation, giving 2x - 6t^2 + 12 = 0. Then add 6t^2 - 12 to both sides of the equation to get 2x = 6t^2 - 12. Finally, divide both sides of the equation by 2 to get x = 3t^2 - 6. This is a parametric representation of the solution set of linear equations. x is a function of parameter t. The solution is given by x = 3t^2 - 6.

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Answer: C = 170

Step-by-step explanation: 45+45+40+40 = 170

Answer:

Your answer is: B) 175ft

Step-by-step explanation:

To fid the perimeter you need to add all the sides together. Don't forget to add the sides that are not labeled, as well as the extra 5ft.

45+45+40+40+5=175

The required, mean for the specific data set will also be greater than the median.

Statistics is the study of mathematics that deals with relations between comprehensive data.

Here,
The relative values of the mean and median are typical of data that have a significant skew to the left, If the data set significant skew to the left implies that the mean of the data set is greater than the median of the data set.

Thus, the required, mean for the specific data set will also be greater than the median.

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The inequalities that are equivalent to the inequality $x<3$ are:

$x<3-b$

$x-b<3$

Note that $x-b-3.0$ and $x-b-3<0$ are not equivalent to $x<3$

and -3 is not an inequality.

Answer:

sorry i don't know but you do it very good i promise

A Boolean data type is a type of data that can have one of two possible values, either true or false.

Boolean values are used in logic and programming to make decisions and determine the flow of a program. In programming, Boolean values are typically represented with 0 for false and 1 for true. Examples of Boolean values include the following:

• (5 > 4)  True

• (10 = 10)  True

• (3 < 2) False

• (17 ≥ 17) True

• (“dog” = “cat”) False

• (“hello” ≠ “goodbye”) True

Boolean values are used in programming to perform calculations, make decisions, and control the flow of a program. For example, an if statement is a type of decision making statement that uses a Boolean expression to determine if a certain condition is true or false. If the condition is true, the program will execute the specified code, and if false, the program will skip the specified code. Boolean values are also used to perform calculations, such as in the AND, OR, and NOT logical operators, which are used to combine two or more conditions into one expression. For example, the AND operator would return true if both of the conditions are true and false if either of the conditions are false.

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The solution is Option A.

The value of the missing length parallel to the side LN of the triangle is 44

If two triangles' corresponding angles are congruent and their corresponding sides are proportional, they are said to be similar triangles. In other words, similar triangles have the same shape but may or may not be the same size. The triangles are congruent if their corresponding sides are also of identical length.

Corresponding sides of similar triangles are in the same ratio. The ratio of area of similar triangles is the same as the ratio of the square of any pair of their corresponding sides

Given data ,

Let the first triangle be represented as ΔLMN

Let the second triangle be represented ΔVUN

The triangles LMN and VUN are similar

The measure of side LV = x

The measure of side LN = 11 + x

So , the corresponding sides of the similar triangles are in ratio

MU / UN = LV / VN

24 / 8 = x / 11

On simplifying the equation , we get

3 = x / 11

Multiply by 11 on both sides of the equation , we get

x = 33

Now , the measure of side LN = x + 11

The measure of side LN = 33 + 11 = 44

Hence , the measure of side LN is 44

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Answer:

Step-by-step explanation:

210