Which expression is equivalent to 15+80

Do u just plot the numbers on the graph like (1,

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn.if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.