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3 years ago

HELP URGENT! 1.(3,-1) reflected over the x axis (-4,3) reflected over the y-axis

Mathematics

1 answer:

vlabodo [156]3 years ago

8 0

1. (3-1) will be 3,-1
2. (-4,3) will be 4,3.
Also is that all?

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Solve x2 - 13x + 30 = 0

Svetllana [295]

Answer:

or, x2-(2-15)x +30= 0

or, x2-2x-15x + 30= 0

or,x(x-2)-15(x-2)=0

or, (x-2) (x-15)=0

either, or,

x-2=0 x-15=0

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3 years ago

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Susan worked 5 out of 8 hours during the day what percentage of the day does she work

Aleksandr-060686 [28]

5/8 * 125/125 = 625/1,000 = 0.625
62.5 percent
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3 years ago

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3 years ago

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den301095 [7]

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4 years ago

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3. A company with loud machinery needs to cut its sound intensity to 44% of its original level. By how many decibels would the l

sergeinik [125]

Answer: 3. The correct option is: A) 3.57 decibels.

6. The correct option is: B) $ln(\frac{x^2}{c^5})$ 

Step-by-step explanation:

3. Sound intensity is cut to 44% of its original level. That means, if the original sound intensity was 100, then now sound intensity will be 44.

So, $I_{0}= 100$ and $I= 44$

Using the formula $L= 10log(\frac{I}{I_{0}})$ , we will get.....

$L= 10log(\frac{44}{100})\\ \\ L= 10log(0.44)\\ \\ L= 10(-0.3565...)=-3.565...\approx -3.57$

(Rounded to the nearest hundredth)

So, the loudness would be reduced by 3.57 decibels.

6. Given expression is: $2ln(x) - 5ln(c)$

First applying the property $m*log(x)= log(x^m)$ , we will get.....

$ln(x^2)-ln(c^5)$

Now using the formula, $log(a)-log(b)= log(\frac{a}{b})$ , we will get....

$ln(x^2)-ln(c^5) = ln(\frac{x^2}{c^5})$

Thus, the answer as a single natural logarithm is $ln(\frac{x^2}{c^5})$

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3 years ago