1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kotegsom [21]
2 years ago
5

3 a. It takes Adriana 20 minutes to walk 5 blocks to the library. Complete the table of equivalent ratios to show Adriana’s two

rates
b. Describe the rate that Adriana walks in blocks per minute and in minutes per block.
c. Adriana wants to know how many blocks she can walk in 45 minutes.
Explain why she can use her rate in blocks per minute to find the answer.
Mathematics
1 answer:
Dafna11 [192]2 years ago
6 0

Answer:

It takes 4 minutes per block and she can walk 12.5 blocks in 45 minutes.

Step-by-step explanation:

20 / 5 = 4 minutes per block

20 + 20 + 5 = 45

5 + 5 + 2.5 = 12.5

Hope this helps, I did the test last year.

You might be interested in
Harold swam 6 2/5 km in 2 hours how far could Harold swim in 5 hours
Mama L [17]

The distance that Harold swim in 5 hours should be 16 km.

Given that,

  • Harold swam 6 2 ÷ 5 km in 2 hours.
  • And, the number of hours given is 5 hours.

Here we assume the distance be x

So,

6\frac{2}{5} =6.4

Now

\frac{6.4}{2}=\frac{X}{5}

2x=(6.4)(5)

2x=32

Now Divide by 2 on both sides  

Thus,  

X=16 km

Therefore, we can conclude that the distance that Harold swim in 5 hours should be 16 km.

Learn more about the distance here: brainly.com/question/12319416

4 0
2 years ago
A line passes through the points (1,4) and (3,−1).<br> What’s the slope of the line?
rodikova [14]

Answer:

-2 1/2

Step-by-step explanation:

Using rise/run

-1 - 4 / 3 - 1

-5 / 2

-2 1/2 or -2.5

3 0
2 years ago
Read 2 more answers
HELPPP<br><br> 12x^5y^4 / 32x^2y^4
Contact [7]

Answer:

\frac{3x {}^{3} }{8}

Step-by-step explanation:

\frac{3 {x}^{3} }{8}

6 0
3 years ago
You wish to compute the 99% confidence interval for the population proportion. How large a sample should you draw to ensure that
Nataly_w [17]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.13}{2.58})^2}=98.47  

And rounded up we have that n=99

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

z_{\alpha/2}=-2.58, t_{1-\alpha/2}=2.58

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.13 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

We assume the value for \hat p =0.5 since we don't have previous info. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.13}{2.58})^2}=98.47  

And rounded up we have that n=99

4 0
3 years ago
Read 2 more answers
Help, WILL GIVE BRAINLIEST
Harlamova29_29 [7]

Answer:

A= 14 B=17 C=20 D=26

Step-by-step explanation:

Not 100% sure this is what you needed but this is my try.

6 0
3 years ago
Other questions:
  • Please help!!!! I dont know how to do this and also please explain!
    11·1 answer
  • How do I solve this using this graph
    12·1 answer
  • HELP WILL NAME BRAINEST
    9·2 answers
  • The area of a rectangle is 32a^3b^4 square units. The length is 4a^2b. Find the width. show your work
    6·2 answers
  • In a study of environmental lead exposure and IQ, the data was collected from 148 children in Boston, Massachusetts. Their IQ sc
    6·1 answer
  • Carmelo's employer matches 15% of carmelos contributions to his 401(k) plan. if carmelos employer contributed $300 to the plan l
    14·2 answers
  • 35 rounded to the nearest 100
    14·1 answer
  • Alejandra wants to raise at least $400 for charity. She has 190 that she will be donating. Alejandra plans to ask her friends to
    6·1 answer
  • • How many newspapers did the two<br> girls bring in altogether each day?
    6·1 answer
  • Which equation is represented by the graph below?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!