SOLUTION: The total value of 23 coins consisting of pennies, nickels and dimes is $1.51. There are twice as many dimes as pennies. Determine the number of pennies, nickels and dimes. Please

Algebra ->  Matrices-and-determiminant -> SOLUTION: The total value of 23 coins consisting of pennies, nickels and dimes is $1.51. There are twice as many dimes as pennies. Determine the number of pennies, nickels and dimes. Please       Log On


   

Question 1168527: The total value of 23 coins consisting of pennies, nickels and dimes is $1.51. There are twice as many dimes as pennies. Determine the number of pennies, nickels and dimes. Please give set up of matrix to enter into graphing calculator.
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
p pennies
n nickels
d dimes
The 23 coins, p%2Bn%2Bd=23

The money $1.51, p%2B5n%2B10d=151, accounting to cents.

Other part of description, 2=d%2Fp
or 2p-d=0.

You might want to use the system as system%28p%2Bn%2Bd=23%2Cp%2B5n%2B10d=151%2C2p%2B0n-d=0%29 to use but converted to a matrix for your graphing calculator.