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larisa [96]
3 years ago
9

One meter of electrical cord costs 3 dollars. How much should one pay for 4 meters?? Please help me out here.

Mathematics
1 answer:
Snowcat [4.5K]3 years ago
3 0

Answer:

$12

Step-by-step explanation:

The best way to do this is with a simple ratio. If you pay $3 for one meter, then for 4 meters, you’d pay $12. You BOUGHT 4 times more cord, which means you’d PAY 4 times more. Thus, 3 x 4 = 12!

Or with ratios:

1 meter : $3

multiplying both sides by 4

4 meters : $12

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Step-by-step explanation:

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Though there is no 1 behind the bracket but, behind any bracket there is 1 there even though it's ignored.

So when we multiply -1 by 4x we are going to get;

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And when we multiply -1 by 3x It's going to be;

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We have -3 and -4 because whenever we multiply any positive and negative number the product is negative.

So;

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So now, we group like terms;

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Which is going to be;

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Step-by-step explanation:

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