A store sells USB flash drives for 25$ each. The mark up fo each USB flash drive is 25%. How much did the stor pay for 50 memory cards

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap