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3 years ago

HELP THIS IS DUE TODAY!!!!!! AHHHHHH

Mathematics

1 answer:

belka [17]3 years ago

8 0

Answer:

260 / 5 = 52

Step-by-step explanation:

give brainliest please

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Find the domain for each expression:

Fiesta28 [93]

1. X<0 or x>0
2. X<0 or x>0
3. X<0 or x>0
4. X<0 or x>0
5. X<2 or x>2

5 0

2 years ago

5(r-10)=-51 what is the value of r

raketka [301]

Use distributive method
5r - 50 = -51
Add 50
5r = -1
Divide by 5
r = -1/5

3 0

3 years ago

Read 2 more answers

"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

7 0

4 years ago

Please help! asap <br> d- 5.44

masya89 [10]

Answer:

Step-by-step explanation:

2.72 is the unit rate

5 0

3 years ago

A car takes 4 hours to cover a distance, if it travels at a speed of 60 mph.

Katena32 [7]

Hello!

In order to solve this equation,we must first find out what distance is being traveled in 4 hours. If we travel 4 hours, at a constant speed of 60 miles,we must multiple those two numbers to find the distance travelled.

60x4 is 240.

This means we must divide 240 by 3 hours to find our constant rate of speed.

240 divided by 3 is 80.

This means, we would need to travel 80 mph to arrive to the same location in three hours.

x=80.

Hope this helps & good luck.

8 0

3 years ago

Read 2 more answers