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3 years ago

How do I simplify the square root: 7 times the square root of 81

Mathematics

1 answer:

DENIUS [597]3 years ago

7 0

$7\cdot\sqrt{81}=7\cdot\sqrt{9\cdot9}=7\cdot9=\boxed{63}$

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Simplify the expression.<br>-7/9-5-10

sergij07 [2.7K]

Answer:

-142/9

Step-by-step explanation:

$-\frac{7}{9}-5-10\\\\-\frac{7}{9}-15\\\\ -15=-\frac{15*9}{9}=- \frac{135}{9}\\\\-\frac{7}{9}- \frac{135}{9}=\frac{-7-135}{9}=-\frac{142}{9}$

6 0

4 years ago

Please help I don’t understand this at all

Natalka [10]

Answer: 33.5

Step-by-step explanation:

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3 years ago

0.000513 in scientific notation

alexira [117]

Answer:

5.13×10⁻⁴

Step-by-step explanation:

0.000513 = 5.13 × 0.0001 = 5.13×10⁻⁴

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3 years ago

•SpringBoard<br> ALGEBRA 1

Ostrovityanka [42]

Step-by-step explanation:

11.3x-12 for x=5

=3(5)-12

=15-12

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=45+15(6-1)

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3 0

3 years ago

On a scale drawing 1/4 inch=1 foot. What are the dimensions on a Scale drawing of a room that is 20ft by 27ft

Gemiola [76]

Answer:

5 inches by $\frac{27}{4}$ inches

Step-by-step explanation:

According to the scale given, to convert "feet" to "inches", we have to multiply each feet by 1/4th. The drawing would be a "smaller" version of the original. That would be in inches.

So, 20 ft would be:

20 * 1/4 = 20/4 = 5 inches

and

27 feet would be:

27 * 1/4 = 27/4 inches

The dimension would thus be:

5 inches by $\frac{27}{4}$ inches

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4 years ago