# Math Help - College algebra 2

1. ## College algebra 2

Mary has $750.00 in 10 and 25 dollar coins. If she has twice as many 10 dollar coins as 25 dollar coins. What's the number of 10 dollar coins she has? 2. x = number of$10 coins

y = number of $25 coins Mary has$750.00 in 10 and 25 dollar coins
10x + 25y = 750

she has twice as many 10 dollar coins as 25 dollar coins
2y = x

solve the system of equations using a method you were taught.