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The value of y varies directly with x. If x = 7, then y = 15.

What is the value of x when y = 45?


A)1/3

B)4

C)21

D)37

Respuesta :

XxpotatoboyxX

Answer:

4

Step-by-step explanation:

No.

Lanuel

The value of x when y is equal to 45 is 21.

Given the following data:

  • x = 7
  • y = 15
  • y = 45

To determine the value of x when y = 45:

Translating the word sentence into a mathematical expression:

[tex]y\;\alpha \;x\\\\y = kx[/tex]

First of all, we would find the value of k.

[tex]k =\frac{y}{x} \\\\k =\frac{15}{7}[/tex]

Now, we can solve for x:

[tex]45 = \frac{15}{7} x\\\\315 =15x\\\\x=\frac{315}{15}[/tex]

x = 21

Read more: https://brainly.com/question/18676621

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