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bezimeni [28]
3 years ago
10

Which property yields Step 2

Mathematics
1 answer:
abruzzese [7]3 years ago
7 0

Answer:

D) Commutative property of addition

Step-by-step explanation:

Commutative property of addition

a + b = b + a

On this case

-12 + 5x = 5x - 12

Answer

D) Commutative property of addition

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Help help help help help
SIZIF [17.4K]

Answer:

1) 2b + 6

2) 8w - 12

3) 2b + 6 + 6x + 20

4) 9w^2 + 27 + 8 - 27

5) Sorry.

Step-by-step explanation:

8 0
3 years ago
Chris wanted to know how likely he is to win at his favorite carnival game. He conducted 50 tests and won 15 times. What is the
aleksklad [387]

Answer:

b.) 0.30

Step-by-step explanation:

15/50 = 0.3

3 0
3 years ago
A manager is comparing wait times for customers in a coffee shop based on which employee is
anyanavicka [17]

Using the t-distribution, as we have the standard deviation for the sample, it is found that there is a significant difference between the wait times for the two populations.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, we test if there is no difference, that is:

H_0: \mu_A - \mu_B = 0

At the alternative hypothesis, it is tested if there is difference, that is:

H_1: \mu_A - \mu_B = 0

<h3>What are the mean and the standard error of the distribution of differences?</h3>

For each sample, we have that:

\mu_A = 73, s_A = \frac{2}{\sqrt{100}} = 0.2

\mu_B = 74, s_B = \frac{4}{\sqrt{100}} = 0.4

For the distribution of differences, we have that:

\overline{x} = \mu_A - \mu_B = 73 - 74 = -1

s = \sqrt{s_A^2 + s_B^2} = \sqrt{0.2^2 + 0.4^2} = 0.447

<h3>What is the test statistic?</h3>

It is given by:

t = \frac{\overline{x} - \mu}{s}

In which \mu = 0 is the value tested at the null hypothesis.

Hence:

t = \frac{\overline{x} - \mu}{s}

t = \frac{-1 - 0}{0.447}

t = -2.24

<h3>What is the p-value and the decision?</h3>

Considering a one-tailed test, as stated in the exercise, with 100 - 1 = 99 df, using a t-distribution calculator, the p-value is of 0.014.

Since the p-value is less than the significance level of 0.05, it is found that there is a significant difference between the wait times for the two populations.

More can be learned about the t-distribution at brainly.com/question/16313918

8 0
2 years ago
Find the volume of the prism
weqwewe [10]
Using the formula V = bh

5 0
3 years ago
Can someone please help me with this?
e-lub [12.9K]
The answer would be D) :)
3 0
3 years ago
Read 2 more answers
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