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zalisa [80]
3 years ago
11

Eighty percent of a number.?as a alegrabatic expression.

Mathematics
1 answer:
Andrews [41]3 years ago
6 0

Answer:

\frac{4}{5} x

or

0.8x

Step-by-step explanation:

80\% \: of \: x =  \frac{80}{100}x \\  \frac{80}{100}  x =  \frac{8}{10}x =  \frac{4}{5}  x = 0.8x

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Nezavi [6.7K]

Answer:

y= \frac{-1}{5} x +4

Step-by-step explanation:

We can find the inverse function of this excercise, isolating X and then changing the variables.

y=-5x+20\\y-20=-5x\\\frac{y-20}{-5} =x\\

\frac{y}{-5}-\frac{20}{-5}  = x\\\frac{-1}{5}y+\frac{20}{5} =x\\ \frac{-1}{5}y+4 =x

And now we change the variables and we get the inverse function:

y= \frac{-1}{5} x +4

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2 years ago
Which property was used to write the equation in step 2?
adelina 88 [10]

Answer:

A

Step-by-step explanation:

Given

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3 years ago
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Helga [31]

Answer:

y=x+2

Step-by-step explanation:

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2 years ago
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Nadusha1986 [10]

Answer:

a = -5

Step-by-step explanation:

Given

-18 + 2a = 2(3a + 1)

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Subtract 6a from both sides

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Divide both sides by -4

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Kruka [31]

Answer:

x = 3 , 2

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