Every evening Jenna empties her pockets and puts her change in a jar. At the end of the week she counts her money. One week she had 50 coins, all of them dimes, and quarters. When she added them up, she had a total of $10.25. How many qurarters did jenna have

Question

Every evening Jenna empties her pockets and puts her change in a jar. At the end of the week she counts her money. One week she had 50 coins, all of them dimes, and quarters.  When she added them up, she had a total of $10.25.  How many qurarters did jenna have

shinalcantara · Answer

let 'x' be the number of dimes
     'y' be the number of quarters
since Jenna had 50 coins, then 
x + y = 50   ----equation 1
and it amounts to 10.25 then you'll have it as:
0.10x + 0.25y = 10.25  ----equation 2
from the two equations, solve the values of x and y