Answer:
a=4, b=5/2
Step-by-step explanation:
Assuming the given equation is

We expand the left hand side to get:

If this equation must have infinitely many solutions, then

Also we must have

Put a=4 to get:


Answer:
All of them
Step-by-step explanation:
2/2 is 1, and if the shaded part is 2/2, everything would be shaded.
Answer: 80
Step-by-step explanation:
He should have subtracted the discount and added the sales tax