Posted by Maddy on Wednesday, August 31, 2005 at 8:19pm.
I have 56 coins consisting of nickels and quarters. The total value of the coins is $5.60. How many of each coin do I have?
Algebra to the rescue...
NN is number of nickles
ND is the number of quarters.
NN*.05 + ND*.25=$5.60
but NN + ND=56
two equations, two unknowns, solve.
its very simple.
let one varible be a representation of the other one.
from there you can plug the equation in.
whenever you have two equations and two variables in each, you follow the steps above to solve them.
How does 42 nickels 14 quarters sound?
n:number of nickels
q:number of quarters
Equation 1: n+q=56
Equation 2: 5n+25q=560
multiply all of Equation 1 by 5-->
then subtract this new equation from Equation 2
solve for q
Answer this Question
Math - Monica was collecting quarters and nickels in a jar. She kept track of ...
math - 1. Ms.lynch has 21 coins in nickels and dimes. Their total value is $1.65...
math - Using pennies, nickels, dimes or quarters, determine which kind of coin ...
Math problem I need help with - Combination of coins that can be used; fifty-...
College Algebra - A coin jar contains nickels, dimes and quarters. There are 46 ...
algebra word problems - you have 95 coins that total $10.75. the coins consist ...
Algebra 2 - You have 10 coins..3 quarters,5 dimes, and 2 nickels. a. A coin is ...
Math - Marsha has nickels, dimes, and quarters. She has 207 coins total. Marcy ...
8th gr. Algebra - I have 3 math problems for homework that are stumping me. Can ...
Math - A coin bank contains only nickels,dimes, and quarters. the value of the ...