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avanturin [10]
3 years ago
15

Am I correct?? Will give brainliest!!!

Mathematics
1 answer:
Rashid [163]3 years ago
3 0

Yes, However the first one is:

1. Distributive Property


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REAL ANSWERS PLEASE AND NOT JUST FOR THE POINTS 20 EACH
Fed [463]
A+b=(-3n+2)+(5n-7)

=(5-3n)+(2-7)

=2n-5


Came up with the same answer as the first guy
4 0
2 years ago
A researcher conducted a paired sample t-test to determine if advertisements were viewed more in the morning (before noon) or in
Natalija [7]

Answer:

b. No, there was no difference between Morning (M= 32), and Evening (M=40.625), (t [7] = 1.15, p > .05).

Step-by-step explanation:

The critical value for one tailed test is t ∝(7) > 1.895

A one tailed test is performed to test the claim that advertisements were viewed more in the morning (before noon) or in the evening (after 5pm)

The null and alternative hypotheses are

H0: μm = μe   vs     Ha μm > μe

where μm is the mean of the morning and μe is the mean of evening.

The calculated value of t = -1.152587077  which is less than the critical region hence the null hypothesis cannot be rejected .

P(T<=t) one-tail 0.143458126 > 0.05

If two tailed test is performed the critical region is t Critical two-tail 2.364624252

and the calculated t value is  -1.152587077  which again does not lie in the critical region .

Hence μm =  μe or    μm ≤ μe

P(T<=t) two-tail 0.286916252  > 0.025

Therefore

b. No, there was no difference between Morning (M= 32), and Evening (M=40.625), (t [7] = 1.15, p > .05).

Option b gives the best answer.

6 0
3 years ago
Keeven uses 78 feet of fence to make a rectangle pan for his pet rabbit. The length of the pin is 20 feet.What is the width of t
jeyben [28]

Answer:

  19 ft

Step-by-step explanation:

The perimeter of a rectangle is given by ...

  P = 2(L +W)

Filling in the given values, we have ...

  78 = 2(20 +W)

  39 = 20 +W . . . . . divide by 2

  19 = W . . . . . . . . subtract 20

The width of the rectangular pen is 19 feet.

3 0
2 years ago
Help!!!!! I have 5 min to finish this
STALIN [3.7K]
Sin O  = 1 / csc O = 2/9
cos O = sqrt (1 - (2/9)^2)  =  sqrt 77/81 = sqrt77 / 9
4 0
3 years ago
A ball is thrown straight up from the top of a 128 foot building with an initial speed of 32 feet per second. How high will the
Brut [27]

Answer:

34

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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