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Scilla [17]
3 years ago
12

What is (-7)^3 / (-7)^4 simplified? Can you walk me through the steps?

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

Answer:

(-7)∧-1

Step-by-step explanation:

(-7)^3 / (-7)^4  

taking each and simplifing it

-7³ = -7 x -7 x -7

(-7)∧4 = -7 x -7 x -7 x -7

(-7)^3 / (-7)^4  = (-7 x -7 x -7 ) / ( -7 x -7 x -7 x -7) = 1/-7

1/-7 ( 1/ means raise to power -1)

1/-7 = (-7)∧-1

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3 years ago
Read 2 more answers
If f(x) =x/4 - 3 and g(x) = 4x2 + 2x - 4, find (f +g)(x).
Iteru [2.4K]

Answer:

4x^2 +9x/4 -7

Step-by-step explanation:

f(x) =x/4 - 3

g(x) = 4x^2 + 2x - 4

(f +g)(x) = x/4 - 3  +  4x^2 + 2x - 4

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8 0
3 years ago
If we accept the null hypothesis when, in fact, it is false, we have: committed a Type II error. a probability of being correct
Greeley [361]

Answer:

Correct option: Type II error.

Step-by-step explanation:

In statistical hypothesis testing two kind of errors can be committed by the researcher.

  1. Type I error: The probability of rejecting a null hypothesis when in fact it is true.
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The power of the test is defined as the probability of rejecting a false null hypothesis. It is denoted by <em>β</em>.

Then the probability of Type II error can be defined as:

P (Type II error) = 1 - <em>β</em>.

The power of the test is affected by the significance level<em>.</em>

If the significance level is less than the power is also less.

The significance level is related to the <em>p</em>-value of the test.

So the P(Correct) = 1 - <em>p</em>-value.

7 0
3 years ago
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