Answer:
B=9 (I'll solve right now, just so you get the answer)
Step-by-step explanation:

Expand right side by distributing

Use the FOIL method to simplify (first, outside, inside, last):


Simplify

Re-insert

Cancel out 

Move all terms to one side

Simplify

Factor out the common term 2

Answer:
$22 for popcorn and $8 for pretzels together it would be $30
Step-by-step explanation:
Answer:
2nd option
Step-by-step explanation:
The domain of a step function is all real numbers.
First, factor the (3y-4) and group the remaining terms
y²(3y-4) +7 (3y-4)
(y²+7)(3y-4)
I hope this helps (: