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3 years ago

Simplify: (–7) • (8) – (4) • (–2) A. 58 B.16 C.–30 D.–48

1 answer:

jeka943 years ago

4 0

D. -48
Put it into your calculator exactly how it is shown up above and you will get the correct answer. Your calculator automatically knows the order of operations.

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Compare the linear functions. Which function has the largest y-intercept?

Jobisdone [24]

Answer:

the one where it passes -2

Step-by-step explanation:

-2 > -3

3 0

3 years ago

Read 2 more answers

Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5

kondor19780726 [428]

Answer: 1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

$E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : $\alpha=1-0.99=0.01$

Using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.005}= 2.831$

Standard deviation: $\sigma=\text{ 2.5 dollars }$

Then, we have

$E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509$

Hence, the margin of error for a 99% confidence interval for the population mean =1.509

4 0

3 years ago

What is 2/3 - 1/2 <br> & <br> 2/5 - 1/8

notsponge [240]

2/3-> 4/6
1/2-> 3/6
Subtract

1/6

2/5-> 16/40
1/8-> 5/40
Subtract

11/40

5 0

3 years ago

You give tours on the Great Lakes and talk about points of interest. A lighthouse typically has 2 beacons that rotate together—b

tatiyna

Since the beacons rotate together, the angular speed is constant.

From the time you see the first beacon, you have to wait for the lighthouse to make 120°, i.e. 1/3 of a whole turn.

So, if T is the time it takes for the lighthouse to make a whole turn, the interval between the first and the second beacon is T/3.

The interval between the second and third beacon is the amount of time it takes to the lighthouse to make the remaining 2/3 of a turn, so that you'll see the first beacon again. So, this time is 2T/3

So, the ratio is

$\dfrac{2T}{3}\div\dfrac{T}{3}=\dfrac{2T}{3}\cdot\dfrac{3}{T}=2$

So, the time between the second and third beacon is twice as much the time between the first two.

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4 years ago

HELP ASAP WILL MARK BRAINLIEST<br><br> Which equation is true?

sesenic [268]

Answer:

C Hope this helps This may be wrong though

Step-by-step explanation:

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2 years ago