Ask Question
12 August, 22:08

Sally has $21.40 in dimes and quarters. There are 100 coins in all. How many of each coin does she have?

+5
Answers (1)
  1. 12 August, 22:12
    0
    x = dimes

    y = quarters

    We also know:

    Dimes: 0.10

    Quarters: 0.25

    100 = x + y

    So, 0.10x + 0.25y = 100

    And, y = 100 - x

    Let's use substitution:

    0.10x + 0.25 (100 - x) = 100

    = 0.10x + 25 - 0.25x = 100

    = 25 - 100 = 0.25x - 0.10x

    = (-75) = 0.15x

    x = (-75) divide by 0.15

    x = (-500)
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Sally has $21.40 in dimes and quarters. There are 100 coins in all. How many of each coin does she have? ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers