Step-by-step explanation:
Case 1 :


Case 2 :


Answer:
c = 40d+20
Step-by-step explanation:
He has to pay 20 dollars and that can't multiply so the forty has to multiply and it would have to be by d because c is the total cost
No because 62122 can not be simplified
She was not supposed to "undistribute" and separate 3x+1 she was supposed to subtract 1 from both sides
I believe the Surface Area is 37 inches^2 and the Volume is 15 inches^2