4+(-7) what is the solution

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

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?