Which of the following measurements could be the three side lengths of a right triangle? 4 cm, 5 cm, 9 cm
12 cm, 20 cm, 25 cm
18 cm, 24 cm, 30 cm
2 cm, 3 cm, 5 cm

Find the solution of each of the following.

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

Which expression is equivalent to 64 - 9x^2?