Tuesday

January 27, 2015

January 27, 2015

Posted by **Maddy** on Wednesday, August 31, 2005 at 8:19pm.

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-->

5n+5q=280

then subtract this new equation from Equation 2

5n+25q=560

5n+5q=280

-_________

20q=280

solve for q

q=14

therefore n=42

**Answer this Question**

**Related Questions**

Algebra - Solve the problem using matrices. John has a jarful of quarters and ...

math - 1. Ms.lynch has 21 coins in nickels and dimes. Their total value is $1.65...

Math - Monica was collecting quarters and nickels in a jar. She kept track of ...

Math problem I need help with - Combination of coins that can be used; fifty-...

math - Using pennies, nickels, dimes or quarters, determine which kind of coin ...

algebra word problems - you have 95 coins that total $10.75. the coins consist ...

College Algebra - A coin jar contains nickels, dimes and quarters. There are 46 ...

math - i have 50 coins in quarters and nickels. if the total value is $5.90, how...

Math - "Jack has a collection of nickels and quarters. He has a total of 50 ...

Math - Marsha has nickels, dimes, and quarters. She has 207 coins total. Marcy ...