Clint is in study hall reading a book. after 20 mins, he is on page 151. after 45 mins, he is on page 181. how many pages has clint read prior to study hall?

I WILL GIVE BRAINLISTS!!!

Can someone answer this question? : )

Find the roots of the equation below. x^2 - 6 + 9 = 0

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex