Question 1090020: He has 14 coins which is eithee 10 dollars or 2 dollars, total ampunt is not greater than 95, how many 10 coins he has? Found 2 solutions by ikleyn, MathTherapy:Answer by ikleyn(52786) (Show Source):
You can put this solution on YOUR website! .
He has 14 coins what are either 10 dollars or 2 dollars, total amount is not greater than 95, how many 10 coins he has?
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Let x = # of 10-dollar coins.
Then the number of 2-dollar coins is (14-x).
The value expression is value = 10x + 2*(14-x) dollars.
Your inequality is
10x + 2*(14-x) <= 95 ====>
Simplify and solve it step by step:
10x + 28 - 2x <= 95,
8x <= 95 - 28 = 67. ====> x <= 8
Answer. Less than 9.
Solved.
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Regarding the answer by @MathTherapy, I want to underline one more time:
The correct answer is "the number of 10-dollar coins is less than 9",
which means N <= 8, BUT NOT NECESSARY N=8.
You can put this solution on YOUR website! He has 14 coins which is eithee 10 dollars or 2 dollars, total ampunt is not greater than 95, how many 10 coins he has?
Number of $10 coins, with N being the number of $10 coins: .
This means that the number of ten-dollar coins, or: (The number of ten-dollar coins range from 1 to 8).
