Find the output y when the input x is -4
y=?

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If the measure of xyz is 81 what is the measure of yz

How do you solve a question like this?

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