Question

y varies jointly with p and q. When p = 1 and q = 2, y = 30. Find y when p = 10 and q = 3. (4 points)
Answer

Answer 1

what does "varies jointly" mean? a linear combination?

Answer 2

yes

Answer 3

i don't think that's enough information to solve the problem

Answer 4

varies jointly is the same as varies directly

Answer 5

these are the answers
y = 60

y = 150

y = 300

y = 450

Answer 6

go get em! klown!

Answer 7

y=kpq
k=y/(pq)=30/2=15
so y=15pq
y=15*10*3=450

Answer 8

ohh, is that what they mean by varies jointly? y=kpq? I thought they might have meant y = ap + bq in which case there was insufficient info. nice one ghass