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notsponge [240]
3 years ago
5

How to find a percentage of a numberExample:        30% off of 120 dollars

Mathematics
2 answers:
Sidana [21]3 years ago
8 0
Times a number by a percent. First turn 30% Ino .3 by putting the decimal point 2 times to the l .
vlabodo [156]3 years ago
7 0
Each percent is basically a decimal in a different form. So 30% .3 (just move the decimal 2 times). Now multiply 120 by .3 and get 36. Just subtract 36 from 120 and get 84.
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4 years ago
What is the value of x in the equation 4x+8y=40 when y=0.8
GREYUIT [131]
Substitute in 0.8 for y.

4x+8y=40 \\ \\ 4x + 8(0.8) = 40 \\ \\ 4x + 6.5 = 40 \\ \\ 4x = 40 - 6.4 \\ \\ 4x = 33.6 \\ \\ x = 8.4 \\ \\

The final result is: x = 8.4.
3 0
3 years ago
Read 2 more answers
Help me plzzzzzzzzz<br> solve for x
Svet_ta [14]

Answer:

7) \frac{x+20}{x}=\frac{46}{30}

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x=37.5

---------------------

8) \frac{10}{3x+1} =\frac{22}{7x-1}

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70x-10=66x+22

70x-66x=22+10

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x=\frac{32}{4}

x=8

<u>---------------------</u>

hope it helps...

have a great day!!

4 0
3 years ago
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