Answer:
p²q-pr²-pq+r²
p²q-pq-pr²+r²
taking common from two term
pq(p-1)-r²(p-1)
again taking common
(p-1)(pq-r²)
is your answer
Based on this, 1 horse year equals 3 human years. Therefore, you multiply 16 (the amount of horse years) and 3 to get 48 human years.
The first one is b the second one is b too
It would be 1 copy, and would cost $42.
39+3(1)=42$
30+12(1)=42$
39+3x, 30+12x are the equations