13 years older than A, B. 6 years younger than c, b. The age ratio of A and C is 9: 5. How old is C?

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

The perimeter of a rectangle is greater than or equal to 74 meters. if the length is 25 meters, the minimum width of the rectangle is meters.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?