<PRE><B>Question 1069023</B>
Write an equation for each phrase/statement 
:
A group of twenty-five coins, composed of nickels, dimes, and quarters.
n + d + q = 25
:
 whose total value is $2.75,
.05n + .10d + .25q = 2.75
:
 If the nickels were dimes, the dimes were quarters, and the quarters were nickels, the total would be $3.75.
.10n + .25d + .05q = 3.75
:
using the matrix feature on your calc,enter
 1, 1, 1, 25
.05 .1 .25 2.75
.1 .25 .05 3.75
you get: 10 nickels, 10 dimes, 5 quarters
 
How many quarters are there in the collection? </PRE>