Solve for the angle x

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!

Which choice represents the sample space ,s for this event

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)