A triangle has sides (3x + 9), (4x - 8), and (10x +21). What is the perimeter
of the triangle?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?