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2 years ago

Carla was asked to draw all the lines of symmetry for a regular pentagon. She drew

Mathematics

1 answer:

Elena L [17]2 years ago

7 0

Answer:

Simple, Her Pentagon is not straight

Step-by-step explanation:

Carla's Pentagon is not straight. Her symmetry line is off scale. Simply fix the Line on the pentagon And it will be correct.

Hope this helps ^

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A survey asked eight people about their wages and educational background. The table shows the hourly wages reported by people wi

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Answer:

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Step-by-step explanation:

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3 years ago

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Add or substract the linear expression.

STatiana [176]

Answer:

-7x - 6

Step-by-step explanation:

Distribute

(−2+5)−1(6+4)+(−7)

(−2+5)−6−4+(−7)

Eliminate redundant parentheses

(−2+5)−6−4+(−7)

−2+5−6−4+−7

Add the numbers

−2+5−6−4+−7

−2−6−6+

Combine like terms

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Answer:

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3 years ago

Chandra earns $12.75 per hour at her job. How many hours will she have to work to earn $344.25

natali 33 [55]

She gotta work 27 hours cuz 344.24/12.75

6 0

3 years ago

In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the popu

olya-2409 [2.1K]

Answer:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

Step-by-step explanation:

Information given

$\bar X= 19.6$ represent the sample mean

$\mu$ population mean

$\sigma= 5.8$ represent the population deviation

n=42 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom, given by:

$df=n-1=42-1=41$

Since the Confidence is 0.98 or 98%, the significance would be $\alpha=0.02$ and $\alpha/2 =0.1$ , and the critical value would be $t_{\alpha/2}=2.42$

Replacing we got:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

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3 years ago

What is h(-4) for h(x) =(x-2)^2 +3x

PSYCHO15rus [73]

$(- 4 - 2)^{2} + 3( - 4) \\ = ( - 6)^{2} + ( - 12) \\ = 36 - 12 \\ = 24$
The answer is 24

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2 years ago