2 years ago

GIVING BRAINLIEST!!!!

Mathematics

1 answer:

Deffense [45]2 years ago

4 0

Answer:

Step-by-step explanation:

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20% of which number is 30? A. 1.5 B. 6 c. 15 D. 150 E. 600

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B is the correct answer

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Help, thank you!

kaheart [24]

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√357

Step-by-step explanation:

multiply all three numbers together and since 357 cannot be simplified it stays as a radical

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3 years ago

A scale has a percent error of 7%. The scale reads the mass of a book as 450g. Which statement describes what the actual mass of

ozzi

Answer:

The actual mass of the book is between 481 . 5 g and 418 . 5 g.

Step-by-step explanation:

The mass of the book on the scale = 450 g

The percentage error in the scale = 7%

So, the actual mass of the book is 450 g ± 7%

Now, 7 % of the mass 450 g = $\frac{7}{100} \times 450 = 31.5$

⇒ 7% of 450 g = 31.5 g

Now, the Actual mass of the book = 450 g ± 31.5 g

450 g + 31.5 g = 481 . 5 g

450 g - 31.5 g = 418 . 5 g

Hence the actual mass of the book is between 481 . 5 g and 418 . 5 g.

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Inverse of the function f(x) = 2x + 5?

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Answer:

$y^{-1} =\frac{1}{2} x-\frac{5}{2}$

Step-by-step explanation:

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Between which two integers does square root of 76 lie?

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Answer is B, because 8*8=64 and 9*9=81. 76 lies between 64 and 81.

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