3 years ago

Factor: 100x^2- 81

Mathematics

1 answer:

Alex17521 [72]3 years ago

7 0

Answer:

Choice 'D' (10x + 9) (10x-9) is the correct answer

Step-by-step explanation:

100x^2 - 81

This is a difference of squares...

therefore = (10x + 9) (10x - 9)

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Find the simplified form of the expression. Give your answer in scientific notation.

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3 years ago

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kolbaska11 [484]

Answer:

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Step-by-step explanation:

The problem states that one plus y is No greater than -13.

This means that is less than or equal to -13.

It also gives you one plus y, or 1+y

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$a\frac{c}{8\pi b}$

Step-by-step explanation:

Divide both sides by $8\pi b$

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4 years ago

Need help + explanation!! ^_^

Paha777 [63]

780, or C, is correct. Since 9.75 is 1/80th of the actual measurement, we can set up an equation like this:

9.75 = 1/80x

Then multiply each side by 80:

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The actual building's height is 780 ft.

We can check this answer by plugging in 780 for x in the original equation:

9.75 = 1/80(780)

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Check! <span>✓</span>

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3 years ago