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r-ruslan [8.4K]
3 years ago
5

I need help with algebra 2 pleasee

Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
5 0

Answer:

x=\pm \sqrt{21}/7

Step-by-step explanation:

We can add 9 to both sides of the equation to get 21x^2=9.

We can divide both sides of the equation by 21 to get x^2=9/21.

We take the square root of both sides of the equation to get x=\pm \sqrt{9/21}.

However, that isn't in the form we need.

We know that \sqrt{9/21}=\sqrt{9}/\sqrt{21}=3/\sqrt{21}=3\sqrt{21}/(\sqrt{21}*\sqrt{21})=3\sqrt{21}/21=\sqrt{21}/7

so the answer is really x=\pm \sqrt{21}/7 and we're done!

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What is 30 percent of 83?
ololo11 [35]

Answer:

24.9

Step-by-step explanation:

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7 0
3 years ago
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Calculate the state income tax owed on a $90,000<br> per year salary.<br> tax = $[?]
lakkis [162]

Answer:

$4918

Step-by-step explanation:

first income must be divided according to tax bracket

2% tax on first 3000 income= 2% of $3000=$60

3% tax on income after first 3000 but upto 5000= 5000-3000= $2000

=3% of 2000= $60

5% tax on income after second 5000 but upto 12000= 17000-5000

=12000 5% of $12000= $600

Lastly, 5.75% income over 17000=

90000-17000= $73000 so, 5.75 % of 73000= $4197.5

tax= $60+60+600+4197.5

= $4917.5

= $4918

6 0
2 years ago
Parisian sewer #1 contains 9 fewer gigantic rats—rats as big as cats, some might say—than parisian sewer #2. parisian sewer #2 c
Leya [2.2K]

There are different kinds of math problem. There will be 11 rats in sewer #1.

<h3>What are word problem?</h3>

The term  word problems is known to be problems that are associated with a story, math, etc. They are known to often vary in terms of technicality.

Lets take

sewer #1 = a

sewer #2 = b

sewer #3 = c

Note that   A=B-9

So then you would have:

A=B-9

B=C- 5

A+B+C=56

Then you have to do a substitution so as to find C:

(B- 9) + (C-5) + C = 56

{ (C- 5)-9} + (C-5) + C = 56

3C - 19 = 56

3C = 75

B = C- 5

B = 25 - 5

Therefore, B = 20

A = B - 9

= 25 - 9

=11

Therefore, there are are 11 rats in sewer #1

Learn more about  Word Problems from

brainly.com/question/21405634

8 0
2 years ago
(−4)4 is the question. it is in math
Zinaida [17]

-4 * 4 = -16

<h2>This is the answer to math</h2>
4 0
3 years ago
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What value of n makes the equation ? 4(0.5-3)=n-0.25(12-8n)​
Free_Kalibri [48]

Answer:

4(0.5-3)=n-0.25(12-8n)

2-12=n-3+2n

-10=-3+3n

-10+3=3n

-7=3n

n=-2.3

7 0
3 years ago
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