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4 years ago

Find the value of y when x = 4 in the equation 3x - 7/y = 1/3 Show your work help

Mathematics

2 answers:

anygoal [31]4 years ago

8 0

Answer:

y = ⅗

Step-by-step explanation:

3x – 7/y = 1/3 Substitute the value of x

3×4 – 7/y = 1/3

12 – 7/y = 1/3 Multiply each side by 3

36 – 21/y = 1 Subtract 36 from each side

-21/y = -35 Multiply each side by y

-21 = -35y Divide each side by -35

y = 21/35 Divide numerator and denominator by 7

y = ⅗

=====

<em>Check: </em>

3×4 – 7/(⅗) = 1/3

12 -7×5/3 = 1/3

12 – 35/3 = 1/3

(36 – 35)/3 = 1/3

1/3 = 1/3

kogti [31]4 years ago

7 0

3(4)-7/y=1/3
12-7/y=1/3
-7/y=1/3-12
-7/y=-35/3
Change signs and cross multiply
21=35y
Y=3/5

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A circle has a circumference of 615.44 units. What is the radius of the circle?

Mama L [17]

Answer:

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Step-by-step explanation:

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maw [93]

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3 years ago

The perimeter of a square is represented by the expression 32x - 12.8 find the side length of the square.

djverab [1.8K]

Given:

Perimeter of a square = $32x-12.8$

To find:

The side length of the square.

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We know that, the perimeter of the square is 4 times of its side length.

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Now,

$4a=32x-12.8$

Divide both sides by 4.

$a=\dfrac{32x-12.8}{4}$

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3 years ago

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the family fine arts center charges $24 per adult and $12 per senior citizen for its performances. on a recent weekend evening w

Leto [7]

337 were senior citizens.

What is the system of equations?

A system of equations, also known as an equation system or a set of simultaneous equations, is a finite set of equations for which common solutions are sought.

Here, we

Let

x = the number of adult tickets sold

y = the number of senior tickets sold

483 people paid admission => a total of 483 tickets were sold and

x + y = 483

the total receipts were $7548

24x + 12y = 7548

by solving the system of equations

x + y = 483....(1)

24x + 12y = 7548....(2)

From equation (1), we get

x = 483-y....(3)

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Now, we put the value of y in equation (1) and we get

x = 483 - 337

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Hence, 337 were senior citizens.

To learn more about the system of equations from the given link

brainly.com/question/25976025

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1 year ago