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galben [10]
3 years ago
5

I’m reposting this because people didn’t answer and wasted my points. If anyone answers something that is not an answer to the m

ath problem, I will report you, and your answer will be deleted along with the points you stole.

Mathematics
1 answer:
andrew11 [14]3 years ago
5 0
The answer is 4 if not sorry
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Solve u^2 = -4, where u is a real number. Simplify your answer as much as possible.
alexdok [17]

Answer:

2i and -2i

Step-by-step explanation:

I'll change u to x to be easier to understand.

x^2 = -4

sqrt(x^2) = sqrt(-4)

sqrt(-4) = 2i, or -2i

8 0
2 years ago
A cable company charges $75 for installation plus $20 per month. Another cable company offers free installation but charges $35
kifflom [539]
It would be 5 months because if you do 75 + 20x = 35x
15x = 75
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15 15
x = 5
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4 years ago
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drek231 [11]

Answer:

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3 years ago
Let y = 7^x. Write an equivalent logarithmic equation.
Fantom [35]

y = log7(x)

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3 years ago
What is the greatest integer value of x for which 5-4x>17?
Sveta_85 [38]
Hi there! The answer is -4

5 - 4x > 17
Subtract 5 from both sides.

- 4x > 12
4x < - 12
Divide by 4

x < - 3
Therefore, the largest integer value of x which makes the inequality true is -4. Not -3, because when filling in -3, the value isn't smaller than -3 anymore.
(Filling in x = -3 gives 17 > 17, which is incorrect).
8 0
3 years ago
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