Answer:
A
Step-by-step explanation:
plz brainlest
Answer:

Step-by-step explanation:
Given

Required
Express as a standard polynomial
We have:

Rewrite as:

Open bracket

Add like terms

Can you please paste a picture of the triangle? I am happy to help, but I need to see the triangle. :-)
Plug y=-5 into the equation
6x+8(-5)=-22
6x-40=-22
6x=-22+40
6x=18
x=3