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Marina CMI [18]
3 years ago
13

How can you use a formula for one measurement to write a formula for a different measurement?

Mathematics
1 answer:
Dmitrij [34]3 years ago
3 0

Answer:

Write the formula for one measurement, then solve the formula for the different measurement you want to find and use this new formula to find that measurement.

Step-by-step explanation:

 We can understand this through an example.

If we need to find the lenght of a rectangle whose width is 4 feet and whose perimeter is 28 feet, we can use a formula for one measurement to write a formula for a different measurement:

 - We need to write the formula for the perimeter of a rectangle:

P=2l+2w

Where "l" is the lenght and "w" is the width.

- Since we know the width and the perimeter of the rectangle and we need to find the lenght, we can solve for "l":

P=2l+2w\\\\P-2w=2l\\\\l=\frac{P-2w}{2}

Now we get a new formula for calculate a differente measurement (the lenght of the rectangle).

- Substituting values, we get:

l=\frac{28ft-2(4ft)}{2}=10\ ft

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