180 pages in 90 minutes as a unit rate

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1