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anonymous
 5 years ago
a collection of 30 coins worth $5.50 consist of nickels, dimes and quarters, rhere are twice as many dimes as nickels ,how many quarters are there
anonymous
 5 years ago
a collection of 30 coins worth $5.50 consist of nickels, dimes and quarters, rhere are twice as many dimes as nickels ,how many quarters are there

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0n + d + q = 30 get all the values in terms of one variable; the variable they give you is "n". n = n d = 2n q = 30n2n = 303n remember these relationships; they come in handy at the end. We know this: n(.05) + 2n(.10) + (303n)(.25) = 5.50 ; solve for "n".

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0.05n +.20n .75n + 7.50 = 5.50 combine like terms. .50n = 2.00 ; multiply each side by (1) .50n = 2.00 ; divide each side by (.50) n = 2/.5 = 20/5 = 4 n=4 d=2(4) = 8 q=30  4  8 = 3012 = 18
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