SOLUTION: i'm stuck on a few problems where i have tied many different equations and end up with a decimal. i'm having trouble finding the equation that hasn't been directly said. for exampl
Question 1065300: i'm stuck on a few problems where i have tied many different equations and end up with a decimal. i'm having trouble finding the equation that hasn't been directly said. for example- A library contains 2,000 books, nonfiction and fiction. one of the equations would be n+f=2,000. i was able to solve that problem with ease. i'm stuck on this question.-"Veronica has been saving dimes and quarters. she has 94 coins in all, and the total value is $19.30. how many dimes and how many quarters does she have?" please help. Answer by ikleyn(52852) (Show Source):
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i'm stuck on a few problems where i have tied many different equations and end up with a decimal.
i'm having trouble finding the equation that hasn't been directly said. for example-
A library contains 2,000 books, nonfiction and fiction. one of the equations would be n+f=2,000.
i was able to solve that problem with ease. i'm stuck on this question.-
"Veronica has been saving dimes and quarters. she has 94 coins in all, and the total value is $19.30.
how many dimes and how many quarters does she have?" please help.
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Veronica.
Let Q be the number of quarters.
Then the number of dimes is (94-Q).
Quarters contribute 25Q cents to the total.
Dimes contribute 10*(94-Q).
The "value" equation is
25Q + 10*(94-Q) = 1930 cents.
Simplify and solve for Q:
25Q + 940 - 10Q = 1930.
15Q = 1930-940 ---> 15Q = 990 ---> Q = = 66.
Answer. 66 quarters and 94-66 = 28 dimes.
