Answer:
18m+20
Step-by-step explanation:
9m(2)+10(2)=18m+20
Answer: 1) it’s x=-1 and x=-11
For the last question, the answer will be the second choose
Step-by-step explanation: sorry dont know the answer for the second question.
I believe it’s y=3x+8 I hope this helps :)
Answer:
We conclude that Jamal will rewired 20 electrical outlets for 7.5 hours.
Step-by-step explanation:
We know that Jamal rewired 4 electrical outlets in 1 and one-half hours. We calculate how many electrical outlets will he rewired for 7.5 hours.
We have the following proportion:

We conclude that Jamal will rewired 20 electrical outlets for 7.5 hours.
F(x) = x2+2x-3 = 1
g(x) = x2-9 = -7
(f/g)(4) = (1/-7)(4) = (-0.14)(4) = -0.57
(f+g)(4) = (1+(-7))(4) = (-6)(4) = -24