Need asap!

1. add or subtract. show all work.

(7x^2+4x--3x+15)

2. multiply. show all work.

(5x-1)(6x^2+3x+7)

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x