Please refer to the image below. I just want to make sure these are the right answers before turning them in :/

Find the difference (8ab+a+2) - (3ab+6)

What percent of 18 is 24? and plz explain thx.

Afarmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. each bag of soil covers 20 square yards. how many bags should the farmer purchase? (4 points) 1 bag 2 bags 3 bags 4 bags