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3 years ago

The area of a trapezoid is 30 cm. If

Mathematics

1 answer:

Arisa [49]3 years ago

7 0

The height of the trapezoid is 2 cm

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Please help me with this problem Evaluate (-½·3)³

-Dominant- [34]

Answer: -27/8

Step-by-step explanation:

$\left(-\frac{1}{2}\cdot \:3\right)^3$

$\mathrm{Apply\:exponent\:rule}:\quad \left(-a\right)^n=-a^n,\:\quad \mathrm{if\:}n\mathrm{\:is\:odd}$

$\left(-\frac{1}{2}\cdot \:3\right)^3=-\left(\frac{1}{2}\cdot \:3\right)^3$

$=-\left(\frac{1}{2}\cdot \:3\right)^3$

$\mathrm{Apply\:exponent\:rule}:\quad \left(a\cdot \:b\right)^n=a^nb^n$

$\left(\frac{1}{2}\cdot \:3\right)^3=\left(\frac{1}{2}\right)^3\cdot \:3^3$

$=-\left(\frac{1}{2}\right)^3\cdot \:3^3$

$=-\frac{1}{8}\cdot \:3^3$

$=-\frac{1}{8}\cdot \:27$

$=-\frac{27}{8}$

3 0

2 years ago

Which operation should be performed first to solve the inequality below? -3x + 5 = 23

Ne4ueva [31]

Answer:

Pass the number 5 to the other side with te opposite sign in order to leave the x alone

it would be

-3x = 23-5

Then you divide by -3 and thats ur answer

4 0

4 years ago

Read 2 more answers

Eighty, decreased by three times a

Marina86 [1]

Answer:

The number is 9.

Step-by-step explanation:

Lets write this as an equation first. We'll substitute the number for the variable x.

80 - 3x = 5x + 8

First, let's add 3x to both sides.

80 - 3x + 3x = 5x + 3x + 8

80 = 8x + 8

Next, let's subtract 8 from both sides.

80 - 8 = 8x + 8 - 8

72 = 8x

Finally, let's divide both sides by 8.

72/8 = 8x/8

9 = x

"x" is 9.

So the secret number is 9.

P.S.

This is my first answer to a Brainly question so please don't complain!

6 0

3 years ago

Decrease 133 in the ratio 7:2

love history [14]

Answer:

Step-by-step explanation

2/7× 133=38

6 0

3 years ago

Abigail and her children went into a movie theater and she bought $71.50 worth of

snow_lady [41]

Answer: The number of drinks she bought would be 6 and the number of pretzels she bought would be 10. 

6 0

3 years ago