I dont know how to answer these, please help

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?