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Liula [17]
3 years ago
11

-13=m-7 please help!

Mathematics
2 answers:
tino4ka555 [31]3 years ago
4 0

Answer:

m= -20

Step-by-step explanation:

-20--7=-13

hope this helps!!!

Ratling [72]3 years ago
3 0

Answer:

20

Step-by-step explanation:

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According to a 2014 research study of national student engagement in the U.S., the average college student spends 17 hours per w
Nadusha1986 [10]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 17

For the alternative hypothesis,

µ < 17

This is a left tailed test.

Since the population standard deviation is not given, the distribution is a student's t.

Since n = 80,

Degrees of freedom, df = n - 1 = 80 - 1 = 79

t = (x - µ)/(s/√n)

Where

x = sample mean = 15.6

µ = population mean = 17

s = samples standard deviation = 4.5

t = (15.6 - 17)/(4.5/√80) = - 2.78

We would determine the p value using the t test calculator. It becomes

p = 0.0034

Since alpha, 0.05 > than the p value, 0.0043, then we would reject the null hypothesis.

The data supports the professor’s claim. The average number of hours per week spent studying for students at her college is less than 17 hours per week.

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3 years ago
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3 years ago
Create an equivalent system of equations using the sum of the system and the first equation. x + 4y = 8 4x + y = 2
qaws [65]

Answer:

Equivalent systems of equations review

Step-by-step explanation:

We're given two systems of equations and asked if they're equivalent.

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Interestingly, if we sum the equations in System A, we get:

x + 4y = 8 \\4x + y = 2 \\

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Replacing the first equation in System A with this new equation, we get a system that's equivalent to System A:

5x+5y=10

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This is System B, which means that System A is equivalent to System B.

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Answer:

D

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((p^4*q)/p^8)^2.

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