Find the value of x to the nearest tenth

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!

What is the answer to the question 5x+2x

Find the slope intercept form of (-3,6) and (3,-6)