To find: A variable for the indicated number and write an inequality based on the given information.
Answer to Problem 13WE
The inequality is
Explanation of Solution
Given:
A coin bank containing only nickels, dimes and quarters has twice as many nickels as dimes and one third as many quarters as nickels. The total value of the coins does not exceed $2.80.
Calculation:
Let d be the number of dimes.
Then, the number of nickels is
If the speed is increase by 10 mi/h, the distance travelled in 3 hours is
The value of 1 nickel is 5 cents, 1 quarter is 25 cents and 1 dime is 10 cents. So, the total amount in the bank is
The total value of the coins does not exceed $2.80, that is 280 cents.
So, the inequality becomes
Chapter 10 Solutions
Algebra: Structure And Method, Book 1
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