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Marat540 [252]
3 years ago
12

Please give me the answer to this it's due at 8:00​

Mathematics
2 answers:
horsena [70]3 years ago
8 0

Answer:

Each metal sheet costs 18 dolares per square foot

Step-by-step explanation:

7.6x−2.3x= $95.40

simplify

5.3x = $95.40

/5.3

x = 18

svetlana [45]3 years ago
6 0

Answer: 20

Step-by-step explanation:

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A teacher claims that the proportion of students expected to pass an exam is greater than 80%. To test this claim, the teacher a
erica [24]

Answer:

z=-1.591

Step-by-step explanation:

Null Hypotheses,

H_0 : p=0.8\\H_a: p>0.80

So we use z-test for one population proportion (right-tailed test)

According to this informaton, we defined that

\alpha=0.05

z_c=1.64 (critical value)

So our Rejection region is R={z:z>1.64}

z=\frac{\bar{p}-p_0}{\sqrt{p_0(1-p_0)/n}} = \frac{0.755-0.8}{\sqrt{0.8(1-0.8)/200}}=-1.591

Not rejection.

6 0
3 years ago
Questions are shown in the picture, any help is appreciated! :)
cestrela7 [59]
A) 13 students
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7 0
3 years ago
Sue has 18 sweets.
Norma-Jean [14]
Easy:

((18-x) -5) + ((18+x)➗2)
7 0
3 years ago
A researcher wants to investigate whether there is a relationship between annual company profit ($) and median annual salary pai
ahrayia [7]

Answer:

D. There is not convincing evidence of a relationship between annual company profit and median annual salary paid by the company.

Step-by-step explanation:

In this hypothesis test, the null hypothesis usually states that there is no relationship between the two variables in study.

In opposite, the claim that is being tested is the speculative hypothesis: that there is a significant relationship between both variables.

The researcher takes a sample and the P-value indicates the probability of getting that sample by pure chance <em>if the null hypothesis is true</em>.

Then, a very small P-value, below the significance level, indicates that the sample is very unusual if the null hypothesis is true, what gives evidence to reject the null hypothesis.

In this case, a P-value of 0.56 indicates that the sample is not unusual if the null hypothesis is true, so it gives no support to the claim that the null hypothesis is false and that there exists a relationship between the two variables in study.

6 0
3 years ago
A triangle has side lengths of 15, 20, and 25. What type of triangle is it?
Vinvika [58]

Acute triangle is the answer

3 0
2 years ago
Read 2 more answers
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