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LUCKY_DIMON [66]

3 years ago

12

plz explain why! Will be marked BRAINLIEST

2 answers:

sdas [7]3 years ago

7 0

Eva is Correct (Unnecessary Stuff)

wlad13 [49]3 years ago

6 0

ANSWER

Eva is correct because 13/2 + 3/2 = 8

There is no mistake. Dakota may have thought that there was a mistake because Eva simplified when she got the answer for 4x which is correct but Dakota may have thought that it was incorrect.

You might be interested in

Which relationships describe angles 1 and 2?

Usimov [2.4K]

Complementary angles

Explanation:
Completely angles are two angles that equal 90°
This is a perfect example of that

6 0

3 years ago

When Marisol is resting her heart beats 70 times per minute.When Marisol is jogging, her heart beats 150 times per minute. Durin

GalinKa [24]

In 1 hour ther are 60 minute so

1/2 hour=30 minutes

so 30 times 70=resting beats per 1/2 hour=2100

then 150 times 30=jogging beats per minute=4500
subtract

4500-2100=2400

it beat 2400 more times

5 0

3 years ago

A study was conducted to compare the proportion of drivers in Boston and New York who wore seat belts while driving. Data were c

allochka39001 [22]

Answer:

a) The test statistic is $z = -2.51$

b) The pvalue is 0.0060.

Step-by-step explanation:

Question a:

Ha: pB < pNY

This means that the alternate hypothesis is rewritten as:

$H_a: p_{B} - p_{NY} < 0$

While the null hypothesis is:

$H_0: p_{B} - p_{NY} = 0$

The test statistic is:

$z = \frac{X - \mu}{s}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis and s is the standard error

pB = 0.581, pNY = 0.832

This means that $X = 0.581 - 0.832 = -0.251$

0 is tested at the null hypothesis:

This means that $\mu = 0$

Standard error = 0.1

This means that $s = 0.1$

Test statistic:

$z = \frac{X - \mu}{s}$

$z = \frac{-0.251 - 0}{0.1}$

$z = -2.51$

The test statistic is $z = -2.51$

Question b:

The pvalue is the probability of finding a proportion less than -0.251, that is, a difference of at least 0.251, which is the pvalue of Z = -2.51.

Looking at the z-table, Z = -2.51 has a pvalue of 0.0060

The pvalue is 0.0060.

5 0

3 years ago

Find the experimental probability that the first three students to arrive at school are boys

julia-pushkina [17]

Answer:

that depends

Step-by-step explanation:

how many students are in the school all together, see you would do the 3 boys over the number of people (or students) in the school

hoped this helped a little

5 0

4 years ago

13 of snow fell in 9 hours. Write the number of inches per hour?

Bezzdna [24]

Answer:

1.44

Step-by-step explanation:

All you have to do is divide 13 by 9 and get 1.44, that is how much snow fell in 1 hour

pls mark brainliest

3 0

3 years ago