Question

For each equation below, determine the value of y, if x = 2.a. y = 7 - 3xb. y = x´2 - 1c. y = (18/x)

Answer 1

This problem is about evaluating equations.

The given value is

`x=2`

(A) For the first equation

`y=7-3x`

We replace the given value

`y=7-3(2)=7-6=1`

Therefore, the value of y in the first equation is 1.

(B) We do the same process to solve the second equation

`y=x^2-1\rightarrow y=2^2-1=4-1=3\rightarrow y=3`

Therefore, the value for y is 3, in the second equation.

(C) We repeat the process for the last equation

`y=(18)/(x)\rightarrow y=(18)/(2)\rightarrow y=9`

Therefore, the value of y is 9, in the third equation.