What is a proportion and how do you use one? Please provide an example.

1 answer:

5 0

A proportion is an equation stating that 2 ratios are equal. One example of using them is in baking. An example of one would be:

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ohaa [14]

Add three to both sides
2x greater than 14 - 5x
Add 5x to both sides
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divide both sides by 7
x is greater than 2

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Gala2k [10]

Answer:

Step-by-step explanation:

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earnstyle [38]

The formula of a midpoint:

$M_{AB}\left(\dfrac{x_A+x_B}{2},\ \dfrac{y_A+y_B}{2}\right)$

We have:

$M(1.5,\ 1.5)\to x_M=1.5,\ y_M=1.5\\A(5,\ 7)\to x_A=5,\ y_A=7$

Substitute

$\dfrac{5+x_B}{2}=1.5\qquad|\cdot2\\\\5+x_B=3\qquad|-5\\\\x_B=-2\\\\\dfrac{7+y_B}{2}=1.5\qquad|\cdot2\\\\7+y_B=3\qquad|-7\\\\y_B=-4$

<h3>Answer: (-2, -4)</h3>

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4 years ago