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Shtirlitz [24]
2 years ago
12

A money box contains only 10-cent and 20-cent coins. There are 34 coins with a total value of $5.40. How many coins of each

Mathematics
1 answer:
kow [346]2 years ago
4 0
10x+20y=540
x+y=34
y=34-x

Plug in (34-x) for y:
10x+20(34-x)=540
10x+680-20x=540
-10x=-140
10x=140
x=14

There were 14 ten cent coins and 20 20 cent coins
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multiplying both-side of the equation by 3

substituting 36 for p to check the solution

Step-by-step explanation:

To solve the equation p/3 = 12, we will follow the steps below;

first multiply 3 to both-side of the equation, that is:

p/3 × 3 = 12 × 3

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3 years ago
What is the answer for this math problem 6x&gt;12
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The correct answer is:   " x  >  2 "  .

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Step-by-step explanation:

______________________________________________________

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Divide each side of the inequality by "6" ;

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4 0
3 years ago
An assembly line has two inspectors. The probability that the first inspector will miss a defective item is 0.06. If the defecti
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Answer:

probability that both passes a defective item is  0.8742‬

<h3>Step-by-step explanation:</h3>

probability that the first inspector misses is Pr( 1st misses)= 0.06

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7 0
3 years ago
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