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3 years ago

Identify the statement that represents the given algebraic expression.

Mathematics

1 answer:

ollegr [7]3 years ago

8 0

Answer:

n is -32

Step-by-step explanation:

$- 17 \times 2 \: equals \: - 32 \\ - 32 \div 2 \: equals \: - 17$

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A driver descended to a depth of -65 feet in 5 minutes. If she descended at the same rate each minute, what’s the rate?

Sidana [21]

This is an easy one.

65/5= 13.

Therefore, she descended 13 feet per minute.

7 0

3 years ago

The caffeine content (in mg) was examined for a random sample of 50 cups of black coffee dispensed by a new machine. The mean an

Genrish500 [490]

Answer:

We are 98% confident interval for the mean caffeine content for cups dispensed by the machine between 107.66 and 112.34 mg .

Step-by-step explanation:

Given -

The sample size is large then we can use central limit theorem

n = 50 ,

Standard deviation $(\sigma)$ = 7.1

Mean $\overline{(y)}$ = 110

$\alpha =$ 1 - confidence interval = 1 - .98 = .02

$z_{\frac{\alpha}{2}}$ = 2.33

98% confidence interval for the mean caffeine content for cups dispensed by the machine = $\overline{(y)}\pm z_{\frac{\alpha}{2}}\frac{\sigma}\sqrt{n}$

= $110\pm z_{.01}\frac{7.1}\sqrt{50}$

= $110\pm 2.33\frac{7.1}\sqrt{50}$

First we take + sign

$110 + 2.33\frac{7.1}\sqrt{50}$ = 112.34

now we take - sign

$110 - 2.33\frac{7.1}\sqrt{50}$ = 107.66

We are 98% confident interval for the mean caffeine content for cups dispensed by the machine between 107.66 and 112.34 .

5 0

3 years ago

At 8:00, the temperature was 15 degrees Celsius (°C). Three hours later, the temperature was -15°C. By how many degrees Celsius

stepladder [879]

Answer:

30 degrees

Step-by-step explanation:

If you were to draw a number line, 15 and -15 are both 15 units away from 0. So, 15 + 15 =30

Please brainlist!

5 0

2 years ago

Which of the following is not an undefined term? point ray line plane

mina [271]

I think that it is point. A point is very precise

7 0

3 years ago

Read 2 more answers

T=4U/E SOLVE FOR U please please please help please thank you

vlada-n [284]

TE/4 =U
Step by step
You multiply both sides by E to get rid of it then you have TE =4U and then u divide it by 4 and get TE/4 =U

3 0

3 years ago