4 years ago

Simplify 81 to the negative 3 fourths power.

Mathematics

1 answer:

olchik [2.2K]4 years ago

3 0

$81^{-\frac{3}{4}}=\frac{1}{81^\frac{3}{4}}=\frac{1}{(\sqrt[4]{81})^3}=\frac{1}{3^3}=\frac{1}{27}$

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In this race speedy mcgoo Ran the 400 m dash in 14.5 seconds. What is his speed in meters per second?

Anuta_ua [19.1K]

Answer:

27.58 meters per second.

Step-by-step explanation:

divide 400 by 14.5

7 0

3 years ago

Let a represent an unknown number. If 33 is 11 more than a, which equation can be used to find a?

Crank

Answer:

$33 - 11 = a$

Step-by-step explanation:

Convert text to an equation:

33 is 11 more than a

33 is 11 + a

$33 = 11 + a$

Subtract 11 on both sides:

$33 - 11 = a$

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3 years ago

Solve for x x= ? 3x-4 3x-8

Musya8 [376]

Answer:

x = 32

Step-by-step explanation:

=> (3x-4) + (3x-8) = 180° (Linear pair)

=> 6x - 12 = 180

=> 6x = 192

=> x = 192/6

Therefore x = 32

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2 years ago

One month, Ruby worked 8 hours more than Isaac, and Svetlana worked 4 times as many hours as Ruby. Together they worked 112 hour

melamori03 [73]

R=8+I
S=4R

R+I+S=112
R+R-8+4R=112
6R=120
R=20

So therefore, Ruby worked 20 hours, Svetlana worked 80 hours, and Isaac worked 12 hours.

3 0

4 years ago

Solve for r. You must write your answer in fully simplified form. -9=-6r

Pie

Answer:

r=3/2

Step-by-step explanation:

-9=-6r

divide -6 on both sides to get r alone.

-9/-6 = r

then simplify. remember that 2 negatives make a positive

r=3/2

5 0

3 years ago

Read 2 more answers