Substitute the values of p and y into the expression -p2 + 2pq -3p2 - 3q2 + pq - q2. Match that value to one of the numbers.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here