The sum of one and the product of one and a number x

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3

Mary and roberto bought identical backpacks at different stores. mary's backpack originally cost $65 and was discounted 25%. roberto's backpack originally cost $75 and was on sale for 30% off on the original price. which backpack was the better buy?

What is the surface area of the triangular prism?