Find the equation of a line containing the given point and slope (10,5); m=9/20

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.