Solve each equation. Check each solution. 3/x =5

Answer:

Just multiply each by 5

Step-by-step explanation:

5x125= 625

explanation:

multiply the previous term by 5

Answer:

95

Step-by-step explanation:

Because they are opposite angle. Since TRV and SRV is opposite that means they are equal each other

The solutions for each of the equations provided in the reference picture is as follows:

(1) [x = (-3)]

(2) [y = (-10)]

(3) (m=3/4)

(4) (b = 0)

(5) (r = 7)

(6) (v = -60)

As per question statement and reference picture, we are provided with 6 different equations which are

(1) [(4 x+1)=(2 x-5)]

(2)[(y-3)=(-3 y-43)]

(3) [(7-14 m)=(2 m-5)]

(4)[(-10 b+5)=(7 b+5)]

(5)[(r+15)=(4 r-6)]

(6)[(10-2 v)=(-5 v-50)]

We are required to find the solution of all the equations mentioned above.

Considering equation (1), we get,

{[(4 x+1)=(2 x-5)] }

or,(4 x-2 x)=[(-1)-5]

or, 2 x=-(1+5)

or, 2 x=-6

or, x={-6}/{2}=(-3)

Considering equation (2), we get,

{[(y-3)=(-3 y-43)] }

or, (y+3 y)=(3-43)

or, 4 y=(-40)

or, y=(-10)

Simplifying equation (3), we get,

{[(7-14 m)=(2 m-5)] }

or, (7+5)=(2 m+14 m)

or, 12=16 m

or, m={12}/{16}={3}/{4}

Simplifying equation (4), we get,

{[(-10 b+5)=(7 b+5)] }

or, (5-5)=(7 b+10 b)

or, 17 b=0

or, b=0

Simplifying equation (5), we get,

{[(r+15)=(4 r-6)] }

or, (15+6)=(4 r-r)

or, 3 r=21

or, r=7

Finally, Simplifying equation (6), we get,

{[(10-2 v)=(-5 v-50)] }

or, (5 v-2 v)=[(-10)-50]

or, 3 v=-(10+50)

or, 3 v=-60

or, v=(-20)

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According to the question, the given parameters with different numbers for the line LH is as follows:

LM =3, MH = k/9 and LH =5

To calculate the distance of the line LH, the expression can be written as:

LH = LM+MH

Substitute the given parameters in the above expression:

5 = 3 + (k/9)

Now, solving above expression, we get the calculated value for the variable 'k':

k = 18 units

Hence, the calculated value for the variable k = 18 units.

How to define distance for the line?

Distance defines the length segment of the line in the coordinate geometry. It is respective length between the two points. In this, the line segment is divided into two parts.

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The cost of the toothbrush will be equal to $14.40. The correct option is A.

The Percentage is defined as representing any number with respect to 100. It is denoted by the sign %. The percentage stands for "out of 100." Imagine any measurement or object being divided into 100 equal bits.

Given that an electric toothbrush costs $72, including a 20% price markup.

The price of the toothbrush will be calculated as,

P = ( 72 x 20 ) / 100

P = 1440 / 100

P = $14.40

Therefore, the cost of the toothbrush will be equal to $14.40. The correct option is A.

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Answer: 60.00

i did the test.

The required answers are-

Part a: The equation that represents the total cost C is C = 250 + 7x.

Part b: The equation that represents the average cost A per person is A = 250 + 7 = 257.

Part c: The estimate number of people who must attend before the average cost drops to $15 per meal is 25.

Part d: The average cost keeps on decreasing exponentially and then becomes straight.

In mathematics, an equation is a formula that expresses the equality of two expressions by connecting them with the equal sign = .

Now it is given that,

Rental of banquet hall = $250

One time charge for meal = $7 per plate

x = the number of people who attend.

Part a: The equation that represents the total cost C

Since there are x people in the banquet

So, number of plates = x

Thus, Total One time charge for meal = 7x

So Total Cost = Rental of banquet hall + Total One time charge for meal

⇒ C = 250 + 7x

this is the equation that represents the total cost C

Part b: The equation that represents the average cost A per person

Putting x = 1 in the above equation of total cost we get,

A = 250 + 7 = 257

this is the equation that represents the average cost A per person

Part c: The estimate number of people who must attend before the average cost drops to $15 per meal

From the graph it is seen that there are 25 people who must attend before the average cost drops to $15 per meal.

Part d: what happens to the average cost as the number of people who attend increases.

The average cost keeps on decreasing exponentially and then becomes straight.

The required answers are-

Part a: The equation that represents the total cost C is C = 250 + 7x.

Part b: The equation that represents the average cost A per person is A = 250 + 7 = 257.

Part c: The estimate number of people who must attend before the average cost drops to $15 per meal is 25.

Part d: The average cost keeps on decreasing exponentially and then becomes straight.

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Answer:

x=7, y=11

Step-by-step explanation:

Using simultaneous equations we can sub y in equation 1 into equation 2.

Equation 1. y=2x-3

Equation 2. x+y=18

Since y=2x-3 we can replace it so that

2'. x+2x-3=18

Now simplify

= 3x-3=18

Add 3 onto both sides to undo the subtraction of 3 so that,

3x=21

Now divide both sides by three to undo the multiplication of 3 so that,

x=7

Now sub in x (which is 7) into one of the equations to find y

7+y=18

To undo the five, subtract 7 from both sides so that

y=11

The equation of the circle with radius 8 and center at (5 , -2) is (x - 5)^2 + (y + 2)^2 = 64.

The general form of the equation of  circle is given by (x - h)^2 + (y - k)^2 = r^2, where (h , k) is the location of the center and r is the radius of the circle.

Given the radius 8 and center at (5 , -2), substitute these values to the general form of the equation of the circle.

(x - h)^2 + (y - k)^2 = r^2

where (h , k) = (5 , -2)

r = 8

(x - 5)^2 + (y - -2)^2 = 8^2

(x - 5)^2 + (y + 2)^2 = 64

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So we are given with three different equations,

[tex]$$\begin{aligned}&x-2 y+3 z=12 \rightarrow(1) \\&2 x-y-2 z=5 \rightarrow(2) \\&2 x+2 y-z=4 \rightarrow(3)\end{aligned}$$[/tex]

We will convert the individual equations into matrices,

[tex]$$\left[\begin{array}{ccc|c}1 & -2 & 3 & 12 \\2 & -1 & -2 & 5 \\2 & 2 & -1 & 4\end{array}\right]$$[/tex]

   [tex]\begin{aligned}&R_2 \leftarrow R_2-2 \times R_1 \\&=\left[\begin{array}{ccc|c}1 & -2 & 3 & 12 \\0 & 3 & -8 & -19 \\2 & 2 & -1 & 4\end{array}\right]\end{aligned}[/tex]

[tex]\begin{aligned}&R_3 \leftarrow R_3-2 \times R_1 \\&=\left[\begin{array}{rrr|c}1 & -2 & 3 & 12 \\0 & 3 & -8 & -19 \\0 & 6 & -7 & -20\end{array}\right] \\&R_2 \leftarrow R_2 \div 3 \\&=\left[\begin{array}{ccc|c}1 & -2 & 3 & 12 \\0 & 1 & -2.6667 & -6.3333 \\0 & 6 & -7 & -20\end{array}\right]\end{aligned}[/tex]

[tex]\begin{aligned}&R_1 \leftarrow R_1+2 \times R_2 \\&=\left[\begin{array}{ccc|c}1 & 0 & -2.3333 & -0.6667 \\0 & 1 & -2.6667 & -6.3333 \\0 & 6 & -7 & -20\end{array}\right] \\&R_3 \leftarrow R_3-6 \times R_2 \\&=\left[\begin{array}{ccc|c}1 & 0 & -2.3333 & -0.6667 \\0 & 1 & -2.6667 & -6.3333 \\0 & 0 & 9 & 18\end{array}\right]\end{aligned}[/tex][tex]\begin{aligned}&R_3 \leftarrow R_3 \div 9 \\&=\left[\begin{array}{ccc|c}1 & 0 & -2.3333 & -0.6667 \\0 & 1 & -2.6667 & -6.3333 \\0 & 0 & 1 & 2\end{array}\right] \\&R_1 \leftarrow R_1+2.3333 \times R_3 \\&=\left[\begin{array}{ccc|c}1 & 0 & 0 & 4 \\0 & 1 & -2.6667 & -6.3333 \\0 & 0 & 1 & 2\end{array}\right]\end{aligned}[/tex]

[tex]\begin{aligned}&R_2 \leftarrow R_2+2.6667 \times R_3 \\&=\left[\begin{array}{ccc|c}1 & 0 & 0 & 4 \\0 & 1 & 0 & -1 \\0 & 0 & 1 & 2\end{array}\right]\end{aligned}[/tex]

[tex]i. e.$$\begin{aligned}&x=4 \\&y=-1 \\&z=2\end{aligned}$$[/tex]

Solution By Gauss elimination method is,

[tex]$x=4, y=-1$ and $z=2$[/tex]

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The total surface area of the pyramid 806.12 [tex]m^{2}[/tex].

The quantity of space enclosing a three-dimensional shape's exterior is its surface area.

Side (s) = 12

Altitude (h) = 6

Area = 3√3/2*s² + 3*s*√(h²+3s²/4)

Area = 3√3/2*(12)² + 3*(12)*√[6²+3(12)²/4]

Area = 806.12 [tex]m^{2}[/tex]

A 3D object's surface area is the entire area that all of its faces cover. For instance, the surface area of a cube is its surface area if we need to determine how much paint is needed to paint it.  

Area of a square is equal to the sum of the lengths of its sides, where an is a square side.

The surface area of a three-dimensional shape refers to the amount of open space that it occupies. A solid shape's volume is the amount of space it takes up.

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Answer:yes b

Step-by-step explanation:

because you subtract it

Answer:

57

Step-by-step explanation:

2 out of 3 can be expressed as 2/3. Since we are looking at the 1 out of 3 people, we can use the expression 1/3 x 171 or 171/3, which equals 57

For the area of triangle, the constant of variation is 1/2.

The link between the independent (x) and dependent (y) variables is shown by a constant of variation. A continuous relationship between the variables indicates to the user that there is one; it does not alter regardless of how the scenario changes.

It can be employed to ascertain how the dependent variable will alter in response to changes in the independent variable. For instance, if a person drives continuously at the same pace, they may calculate their distance by multiplying the number of hours they spent driving by the speed they were moving at. In this instance, the speed is the constant since it remained constant regardless of how long or how far they travelled during the journey.

A triangle's area is equal to (1/2) * (base) * (height).

It fluctuates in tandem with both the base length and the height.

The (1/2) represents the variational constant.

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   The equation of the parabola that has vertex at (1,4) and focus (1,6) is

  A parabola is a quadratic function that can move on any axis, it is composed of:

   The equation that defines a parabola can be given by:

(x - h)² = 4p(y - k)

(y - k)² = 4p(x - h)

  This will depend on its aperture

  Since the vertex and the focal axis are on the same axis, we analyze that:

(x - 1)² = 4p(y - 4)

f = (1, 4 + p)

4 + p = 6

p = 6 - 4

p= 2

(x - 1)² = 4*2(y - 4)

(x - 1)² = 8(y - 4)

x² - 2x + 1 - 8y + 32 = 0

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Answer:

6 pack of t shirts for 15 :3

Step-by-step explanation:

The average is calculated by adding up all the data sets, then dividing that total by the total number of data points. She used 6 gallons of gas on her trip.

In mathematics, the middle value—which is determined by dividing the sum of all the values by the total number of values—is the average value in a set of numbers. To calculate the average of a set of data, add up all the values and divide the result by the total number of values.

The two unit rates of (30 miles per gallon) and can be used to convert three hours to gallons of gas (60 miles per hour).

30 miles = 1 gallon of gas used

For (30 × 2) 60 miles = 2 gallons of gas used

2 gallons of gas she used per hour.

Susan goes 180 miles in 3 hours (60 miles per hour).

Therefore,

For 3 hrs = 3 × 2 = 6 gallons of gas used.

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Answer: 1

Step-by-step explanation:

s = 5, t = 2

10/5*2

= 10/10

=1

The equivalent expression of (5 ^3/4)^2/3 is √5

Expressions are mathematical statements that are represented by variables, coefficients and operators

Rational expressions are expressions that are represented by the quotient of two polynomials or radicals.

This means that, a rational expression is represented by a fraction whose numerator and denominator are polynomials or radicals

The expression is given as

(5 ^3/4)^2/3

Evaluate the product of the exponents

So, we have

(5 ^3/4)^2/3 = 5^(3/4 x 2/3)

Evaluate the product of the exponents

So, we have

(5 ^3/4)^2/3 = 5^(2/4)

Evaluate the quotient

So, we have

(5 ^3/4)^2/3 = 5^(1/2)

Express as square roots

So, we have

(5 ^3/4)^2/3 = √5

Hence, the equivalent expression of (5 ^3/4)^2/3 is √5

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Answer:

(Some textbooks describe a proportional relationship by saying that " y varies proportionally with x " or that " y is directly proportional to x .") This means that as x increases, y increases and as x decreases, y decreases-and that the ratio between them always stays the same.

10:4 = 5:2

6:2 = 3:1      

Not equal.

Simplification of the given complex fraction [tex]\frac{3}{\frac{x-4}{1-\frac{2}{x-4} } }[/tex]  is equal to 3/(x-6).

As given in the question,

Given complex fraction is [tex]\frac{3}{\frac{x-4}{1-\frac{2}{x-4} } }[/tex]

Simplify the denominator by taking least common multiple,

[tex]\frac{3}{\frac{x-4}{1-\frac{2}{x-4} } }\\\\\\= \frac{3}{\frac{x-4}{\frac{x-4-2}{x-4} } }\\\\\\= \frac{3(x-4)}{(x-6)(x-4)} \\\\\\=\frac{3}{x-6}[/tex]

Therefore, simplification of the given complex fraction [tex]\frac{3}{\frac{x-4}{1-\frac{2}{x-4} } }[/tex]  is equal to 3/(x-6).

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The expected value of chi-square statistics is not significantly different from the observed value.

What is chi-square statistics?

Chi-square statistics is defined as a measure that is used to denote the difference between the expected frequencies and the observed frequencies of an event. It is illustrated using the symbol, 'χ2'.

Deciding for the goodness of a fit

The assigned value of chi-square is 1.273 while the critical value is 13.388

The hypotheses for the goodness of fit test are given below:

Null Hypothesis: the expected value is not significantly different from the observed values

Alternate Hypothesis: the expected value is significantly different from the observed values

We know that the chi-square test is right-tailed.

Further, the value of test statistics is 1.273, which is less than the critical value, 13.388

Thus we fail to reject the null hypothesis and we accept it.

Hence, we can conclude that the expected value is not significantly different from the observed value.

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The value of term a9 is 9k+32.

The difference between any two consecutive integers in an arithmetic progression (AP) sequence of numbers is always the same value.

The formula of Arithmetic progression is

a(n) = a1 + (n - 1)d

given that the term of arithmetic sequence and common difference,

a1 = 4 and d = K+4.

now find the value of term a9.

a(n) = a1 + (n - 1)d

now, substitute a(n) = a9, a1 = k, d = k+4.

a9 = k + (9 - 1)(k+4)

a9 = k + 8(k+4)

a9 = k + 8k + 32

a9 = 9k +32

Hence,The value of term a9 is 9k+32.

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Answer:

a: 57.3

b: 3.8

Step-by-step explanation:

a: The formula to solve a triangle is a=height*base/2

that makes a= 9.96*11.5/2

a=57.27~=57.3

b: because there is 15 balls take 57.27 and divide it by 15

57.27/15=3.8

Applying the midpoint formula, the coordinates of B are: (-7, 4).

The midpoint formula is:

M(x, y) = [(x2 + x1)/2, (y2 + y1)/2]

Given:

M(x, y) = (-3, 0)

A(x1, y1) = (1, -4)

B(x2, y2) = (?, ?)

Plug in the values into the midpoint formula:

M(-3, 0) = [(x2 + 1)/2, (y2 + (-4))/2]

Isolate each coordinate

-3 = (x2 + 1)/2

-6 = x2 + 1

-6 - 1 = x2

x2 = -7

0 = (y2 - 4)/2

0 = y2 - 4

y2 = 4

Therefore, applying the midpoint formula, the coordinates of B are: (-7, 4).

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The variables that

x + y = 2100  

5 x + 7 y = 11700  

Let x = total dollar amount of sales of phone;

      y = total dollar amount of sales of computer

for total sales of phones anna earns 5% commission

So anna 's commission = 5% of x

                                       = 0.05x

for total sales of computer anna earns 7% commission

So anna 's commission = 7% of y

                                       = 0.07y

Given the total sales; x + y = 2100

And commission; 0.05x + 0.07y = 117; or 5x + 7y = 11700

Therefore the system of equations are

x + y = 2100   …….equation (1)

5 x + 7 y = 11700  ……equation (2)

In mathematics, a variable is a symbol and placeholder for any mathematical object. In particular, a variable may represent a number, a vector, a matrix, a function, the argument of a function, a set, or an element of a set.

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The expression to find the population of fruit flies Lavania observed after 6 days is 9 + 5 * 20 and the value is 109

The given parameters are

Day 1 = 20 fruit flies

Day 6 = 9 more than 5 times as many fruit flies on day 1

The above expression can be rewritten as

Day 6 = 9 + 5 * Day 1

This gives

Day 6 = 9 + 5 * 20

Evaluate the product

Day 6 = 9 + 100

Evaluate the sum

Day 6 = 109

Hence, the expression to find the population of fruit flies Lavania observed after 6 days is 9 + 5 * 20 and the value is 109

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The area of the floor on which Connie is laying the carpet is 9.88 m²

An equation is an expression that shows the relationship between two or more numbers and variables.

Area is the amount of space occupied by a two dimensional shape or object.

Connie is ordering new carpet for a room 2.6m*3.8m*8.3m. Hence:

Area of the floor = 2.6 m * 3.8 m = 9.88 m²

The area of the floor on which Connie is laying the carpet is 9.88 m²

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Answer:

384

Step-by-step explanation:

8x4=32 32x 12 cans=384 sq centimeters