Problema Solution
Joan has some dimes and quarters. if she has 16 coins worth a total of $2.95, how many of each type of coin does she have?
Answer provided by our tutors
.1x + .25y = 2.95
x + Y = 16
10x + 25y = 295
10x + 10y = 160
15y = 135
y = 9
x= 7