Help help help help help I have 5 minutes

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

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