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BartSMP [9]
3 years ago
15

How do u take 40% off on something

Mathematics
2 answers:
abruzzese [7]3 years ago
6 0
Find 10% of it (just move the decimal point one spot to the left) and multiply by 4
jeyben [28]3 years ago
5 0
If your number is x, and you want to take 40% off of x you have to multiply x by .4, then subtract that number from x
So...
x-.4x= 40% off of x
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What is the solution to the equation below
azamat

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x=-4

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DanielleElmas [232]

Answer:

Step-by-step explanation:

Given expression is,

\text{cot}A=\frac{1}{2}(\text{cot}\frac{A}{2}-\text{tan}\frac{A}{2})

To prove this identity we will take the right side of the identity,

\frac{1}{2}(\text{cot}\frac{A}{2}-\text{tan}\frac{A}{2})=\frac{1}{2}(\frac{1}{\text{tan}\frac{A}{2}}-tan\frac{A}{2})

                         =\frac{1}{2}(\frac{1-\text{tan}^2\frac{A}{2}}{tan\frac{A}{2}})

                         =\frac{1}{2}[\frac{2(1-\text{tan}^2\frac{A}{2})}{2tan\frac{A}{2}}]

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                         = cot A

Hence right side of the equation is equal to the left side of the equation.

3 0
3 years ago
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