Invention cost three dollars for a pack of eight. laura gives the cashier $20 to buy inventions and gets $11 and change. how many packs of inventions does laura by?

On a piece of paper graph f(x)=5•(0.4)^x

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.

Evaluate the expression. (9 + 5)(3 + 2)0