Find the input (x) of the function y=3x - 7 if the output (y) is 5

Hello there,

The following question is asking for us to determine the x value if the y value is 5.

In order for us to solve this we start by plugging in 5 for the y value:

Now we add 7 to both sides:

Then we divide both sides by 3:

Therefore, when the output is 5 the input has to be 4.

Hope I helped,

Amna

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,