What is the value of y=8−3x when x=5?

When x=5, y=

-7 will be the answer.

Step-by-step explanation:

By Putting the value of x, we get:

y=8-3x

y=8-3(5)

y=8-15

y= -7

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.