Prove why 0.87 recurring is equal to the fraction 87/99
(ps both the 8 and the 7 are recurring)

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?