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 - 24 1c coins are set out in a row on a table. Then every 2nd coin is ...
math $$ - ty sooooo much another question (sorry about all these just trying to ...
MATHS - 24 1c coins are set out in a row on a table Then every 2nd coin is ...
algebra with pizazz pg 40 riddle - what is the riddle answer??? missed lesson ...
Stats - There are 21,000 students in a MOOC. Each student tests the fairness of ...
Alg2 - Please Help... You buy a commemorative coin for $25. The value of the ...
Alg 2 - Please Help... You buy a commemorative coin for $25. The value of the ...
Alg2 - Help...Please... You buy a commemorative coin for $25. The value of the ...
physics - a contestant projects a coin with a speed of 7 m/s at an angleof 60 ...
Physics - (b)A coin is placed 20 cm from the axis of a rotating turntable of ...