What is the exact value of 5 5/6- (1 1/4 +3 7/8)

What is the measure of the smallest angle in the diagram? 15 29 32 45

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12