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3 years ago

What’s the value of n? 3^n=1/9

Mathematics

1 answer:

Pepsi [2]3 years ago

4 0

Answer:

n= -2

Step-by-step explanation:

3^n = 1/9

3^n = 1/(3^2)

3^n = 3^(-2)

n = -2

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What is the answer please help

satela [25.4K]

0.9 seconds is the correct answer

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3 years ago

Solve the system, or show that it has no solution. (If there is no solution, enter NO SOLUTION. If there are an infinite number

liberstina [14]

Answer:

The system has an infinite set of solutions $(x,y) = (x, \frac{x-5}{4})$

Step-by-step explanation:

From the first equation:

$20x - 80y = 100$

$20x = 100 + 80y$

$x = \frac{100 + 80y}{20}$

$x = 5 + 4y$

Replacing on the second equation:

$-14x + 56y = -70$

$-14(5 + 4y) + 56y = -70$

$-70 - 56y + 56y = -70$

$0 = 0$

This means that the system has an infinite number of solutions, considering:

$x = 5 + 4y$

$4y = x - 5$

$y = \frac{x - 5}{4}$

The system has an infinite set of solutions $(x,y) = (x, \frac{x-5}{4})$

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2 years ago

it takes 21 minutes for 5 people to paint 7 walls. how many minutes does it take 3 people to paint 10 walls

tensa zangetsu [6.8K]

21/7=3mins per wall with 5 people.
Because we assume that all of the people paint at the same rate, 3 X 5=15 mins for one person working alone.
15/3=5 mins per wall with 3 people X 10 people= 50 mins for 3 people to paint 10 walls.

The answer is 50 mins.

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3 years ago

Which best describes a scalene triangle?

FinnZ [79.3K]

Answer:

All three sides of the triangle are different lengths.

Step-by-step explanation:

hope this helps :)

6 0

3 years ago

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A puppy ways 5 3/4 how many does the puppy way in ounces???<br><br> I NEED HELP ASAP!!