Question

solve, p varies partly as q and partly as the square of r, when p=6,q=8 and r=4 and when p=10,q=12 and r=5.(a)find the formula connect p,q and r(b)find p when q=15,r=25.(c)find r when p=2•5 and q=4

Answer 1

p = aq+br^2
now use what they told you, and solve
8a+16b = 6
12a+25b = 10
and you get
p = -5/4 q + r
now just plug and chug to solve the rest