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vovangra [49]
3 years ago
11

All of the following are equivalent except _____.

Mathematics
2 answers:
Mamont248 [21]3 years ago
7 0
(-2) 4 is -8
-2(4) -8
(-2)(-2) is 4 (-2) is -8 (-2) is -16
2 4 is 8
if the question is referring to the only positive number it's D. If it's referring to the only different number it's -16
Musya8 [376]3 years ago
6 0

Answer:

a. -2 4

Step-by-step explanation:

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The circle given by x^2+y^2-6y-12=0 can be written in standard form like this: x^2+(y-k)^2=21 What is the value of k in this equ
sweet [91]

Answer:

The value of k =3

Step-by-step explanation:

x^2+y^2-6y-12=0 We need to solve this equation to become in standard form to find the value of k.

x^2+y^2-6y-12=0\\x^2+y^2-6y = 12\\(x)^2 +(y^2-2(y)(3)+(3)^2) = 12 +(3)^2\\(x)^2+(y-3)^2 = 12+9\\(x)^2 +(y-3)^2 = 21

The given standard form is:

x^2+(y-k)^2=21

Comparing it with (x)^2 +(y-3)^2 = 21

The value of k =3

3 0
3 years ago
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The domain of F(x) is the set of all numbers greater then or equal to 0 and less or equal to 2.
lisov135 [29]
The answer should be B false
5 0
3 years ago
An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 75 type K batteries and a sample of 46
lorasvet [3.4K]

The decision rule for rejecting the null hypothesis, considering the t-distribution, is of:

  • |t| < 1.9801 -> do not reject the null hypothesis.
  • |t| > 1.9801 -> reject the null hypothesis.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if there is not enough evidence to conclude that the mean voltage for these two types of batteries is different, that is, the subtraction of the sample means is of zero, hence:

H_0: \mu_1 - \mu_2 = 0

At the alternative hypothesis, it is tested if there is enough evidence to conclude that the mean voltage for these two types of batteries is different, that is, the subtraction of the sample means different of zero, hence:

H_1: \mu_1 - \mu_2 \neq 0

We have a two-tailed test, as we are testing if the mean is different of a value.

Considering the significance level of 0.05, with 75 + 46 - 2 = 119 df, the critical value for the test is given as follows:

|t| = 1.9801.

Hence the decision rule is:

  • |t| < 1.9801 -> do not reject the null hypothesis.
  • |t| > 1.9801 -> reject the null hypothesis.

More can be learned about the t-distribution in the test of an hypothesis at brainly.com/question/13873630

#SPJ1

3 0
1 year ago
N.<br> Solve the expression.<br> Use PEMDAS<br> [2.1+(9.2 x 3.3)] x 0.8=<br> -
densk [106]

Answer:

  25.968

Step-by-step explanation:

The Google calculator will reliably use PEMDAS to evaluate an expression.

 = (2.1 +30.36)×0.8

 = 32.46×0.8

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If entering this expression into your calculator gives a different result, get a better calculator.

6 0
3 years ago
What is the value of x?
Nikitich [7]

(x + 1)·(x + 1 + 11) = (x + 4)·(x + 4 + 1) --> x = 2

Tools like "photomath" are able to help you solving such equations.

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