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zaharov [31]
3 years ago
5

HELP IF YOU SOLVE THIS 100 PTS

Mathematics
2 answers:
postnew [5]3 years ago
8 0
68% is the answer or 68.333% for an exact answer
Hope this helps(:
mariarad [96]3 years ago
3 0
Calculater I'm pretty sure
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3 out of 4 students like to eat breakfast at school. What percent of students like to eat breakfast?
melomori [17]

Answer:

The answer is that 75% of the student like to eat breakfast.

6 0
3 years ago
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5+-7+3+-6=-5 what is the work
spayn [35]
5+(-7)+3+(-6)=-5
Answer is zero
6 0
4 years ago
Pls help (have a good day Jesus loves you:) :) .)
murzikaleks [220]

Answer:

4^6

Step-by-step explanation:

5 0
3 years ago
Someone claims that the average amount of time that a freshman at TAMU studies is 7 hours. We think it’s higher than that and de
Stels [109]

Answer:

Test statistic t = 5.25

P-value = 0.000002 (one-tailed test)

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the average amount of time that a freshman at TAMU studies is significantly higher than 7 hours.

Then, the null and alternative hypothesis are:

H_0: \mu=7\\\\H_a:\mu> 7

The significance level is 0.05.

The sample has a size n=49.

The sample mean is M=8.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=√s^2=√4=2.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{2}{\sqrt{49}}=0.29

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{8.5-7}{0.29}=\dfrac{1.5}{0.29}=5.25

The degrees of freedom for this sample size are:

df=n-1=49-1=48

This test is a right-tailed test, with 48 degrees of freedom and t=5.25, so the P-value for this test is calculated as (using a t-table):

\text{P-value}=P(t>5.25)=0.000002

As the P-value (0.000002) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the average amount of time that a freshman at TAMU studies is significantly higher than 7 hours.

6 0
3 years ago
What is the value of x in the equation 4x + 8y = 40, when y = 0.8?
storchak [24]
To find your answer you must substitute y for 0.8
4x + (8)(0.8) = 40
Now solve for x
====================================================================
SOLVING...

<span>4x + (8)(0.8) = 40
</span><span>4x + 6.4 </span>= <span>40
</span>
Subtract 6.4 from each side
<span><span><span>4x</span>+ 6.4 </span>− 6.4 </span>= <span>40 − <span>6.4
</span></span>4x = 33.6

Divide each side by 4
4x ÷ 4 = 33.6 ÷ 4
x = 8.4
3 0
3 years ago
Read 2 more answers
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