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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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Can someone finish the whole thing ??
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<h3>Answer:    y = (3/2)x + 0</h3>

This is the same as  y = (3/2)x

=============================================================

Work Shown:

Find the slope of the line through (x1,y1) = (-2,-3) and (x2,y2) = (2,3)

m = (y2 - y1)/(x2 - x1)

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The slope is the fraction 3/2. This is going to be in front of the x, or to the left of the x.

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Plug m = 3/2 and (x1,y1) = (-2,-3) into the point slope formula. Solve for y.

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