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2 years ago

What's the answer to 4n - 9 = -9

2 answers:

8 0

Hello!

You solve this algebraically

4n - 9 = -9

Add 9 to both sides

4n = 0

Divide both sides by 4

n = 0

The answer is 0

Hope this helps!

ratelena [41]2 years ago

8 0

The answer you are looking for is "n = 0".

This can be found by adding 9 to each side, which would leave you with "4n = 0". To get "n" by itself, you'd then divide both sides by 4. "N" in this case would equal 0, because 0 divided by any number, will always be 0.

To check this answer, you could replace "n" with 0, and solve the left side. This would leave you with "-9 = -9", meaning the answer is correct.

I hope this helps!

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3 years ago

For what values of x is x2 + 2x = 24 true?

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3 years ago

Read 2 more answers

Brand X sells 21 oz. Bags of mixed nuts that contain 29% peanuts. To make their product they combine brand A mixed nuts which co

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Answer:

Brand X has to mix 8.4 oz of brand A mixed nuts which contain 35% peanuts and 12.6 oz of brand B mixed nuts which contain 25%, to obtain 21 oz. Bags of mixed nuts that contain 29% peanuts.

Step-by-step explanation:

We define

$B_{A}=1oz @ 35\%$ , wich means Brand A has 1 oz containing 35% peanuts.

$B_{B}=1oz @ 25\%$ , wich means Brand b has 1 oz containing 25% peanuts.

So we can build an equiation system

(1) $B_{a}+B_{b}=21$

(2) $0.35 \times B_{a}+0.25 \times B_{b}=0.29 \times 21$ , after fixing it a little

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As we can use any method to solve the system, I used a calculator wich thrown the following results $B_{a}=8.4 \ oz$ and $B_{b}=12.6 \ oz$ .

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2 years ago

Help !!!!

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now we find the difference between the mean and each number
1, 2, 3, 0.5, 0.25, 1.25, 1.

now we square the numbers
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now we find the mean of the new numbers
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2.1875 is your standard deviation.

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2 years ago

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y=3 when x=15

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3 years ago