2 years ago

Which equation can be used to solve the problem? 495 is 55 percent of what number?

Mathematics

2 answers:

BlackZzzverrR [31]2 years ago

7 0

55/100 x = 495 that is the answer

fredd [130]2 years ago

3 0

Answer:

55/100 * x = 495

Step-by-step explanation:

The unknown number is x.

55% of x = 495

55/100 * x = 495

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tigry1 [53]

Answer:

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Step-by-step explanation:

By the cos double angle formula, we know $\cos(2\theta)=2\cos^2\theta-1.$ Substituting $\cos \theta$ into the formula, we get

$\cos(2\theta)=2(-\frac{1}{7})^2-1\\~~~~~~~~~~=\frac{2}{49}-1\\~~~~~~~~~~=\boxed{-\frac{47}{49}}$ .

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