7a + b - 12 wich is the coefficient?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Find the area of a parallelogram with base 15 yards and height 21 2/3

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