Keana’s piggy bank contains $4.30 in nickels and dimes only. If she has 59 coins in her bank, then what is the sum of the digits in the number of nickels in Keana’s bank? Write a system of equations for this situation and find its solution.
Two angles are complementary if the sum of their measures is 90°. Find two complementary angles such that the smaller angle is 118° less than 3 times the larger angle.
The total age for Amelia, Bernard, and Cindy is 10w years. Amelia is 2w years old. Bernard is as old as Cindy.
Express Cindy's age in terms of w. If w = 4, how old is Cindy? 
Examples
All
