write the ratio as a fraction in the simplest form, with whole numbers in the numerator and denominator 20 he to 24 hr

Plz hurry evaluate the expression a+b where a=8 and b=19

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

Abaseball team drinks 10/4 gallons of water during a game. which mixed number represents the gallons of water consumed? a) 1 1/2 gallons b) 2 1/2 gallons c) 2 3/4 gallons d) 3 1/2 gallons