8r and 4r are like terms since they both have an r
also 3s and -3s are also like terms because of the s
He should have subtracted the discount and added the sales tax
Answer:
Step-by-step explanation:
it is an adjacent/linear pair
The volume will decrease.
If everything else remains the same then it will decrease. If other sides were increased proportionally then it would stay the same. It would increase if other sides were enlarged more than the length was shortened.
