Answer:
<h2>d. 10a + 5b</h2>
Step-by-step explanation:
5(a + a + b) = 5(2a + b)
use the distributive property:
<em>a(b + c) = ab + ac</em>
<em />
= 5 · 2a + 5 · b =10a + 5b
Answer:
0
Step-by-step explanation:
use the slope formula <u>y^2-y^1</u>
x^2-x^1
Your answer will be 21x+7y-13