Coin Ivan
November 17th, 2007
Ivan collects antique quarters and nickels. He has a total of 12 coins.?
Ivan collects antique quarters and nickels. He has a total of 12 coins. The number of quarters is twice the number of nickels. Which system of linear equations represents the problem? Let q represent the number of quarters and n represent the number of nickels.
q = qurarters
n = nickels
TWO EQUATIONS
- first requirement “total = 12″
q + n = 12
- second requirement number of quarters = 2 x number of nickels
q = n * 2
- solution step – substitute eq2 for q in eq1
2n + n = 12
3n = 12
n = 4
fabe – comme un rat dans le coin (a capella)