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gulaghasi [49]
2 years ago
9

Which of the following expressions are equivalent to 6 + (-4) - 5 ?

Mathematics
2 answers:
alex41 [277]2 years ago
8 0

Answer:

Step-by-step explanation:

6 + (-4) - 5 = 6 - 4 - 5 = 6 - 9 = -3

A. - (-6 + 4) - 5 = -(-2) - 5 = 2 - 5 = -3

C. 6 - (4 + 5) = 6 - 9 = -3

Gekata [30.6K]2 years ago
6 0

Answer:

A

C

Step-by-step explanation:

A and C gives same result....

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McAllister et al. (2012) compared varsity football and hockey players with varsity athletes from noncontact sports to determine
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Answer:

t _{critical} = 1.760

t = 2.2450

d. 0.264

Step-by-step explanation:

The null hypothesis is:

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Alternative hypothesis;

H_a : \mu_1 - \mu_2 > 0\\

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S_p^2 = \dfrac{(n_1-1)S_1^2+(n_2-1)S^2_2}{(n_1-1)+(n_2-1)}

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The t-test statistics can be computed as:

t= \dfrac{(x_1-x_2)-(\mu_1 - \mu_2)}{\sqrt{Sp^2 ( \dfrac{1}{n} +\dfrac{1}{n_2})}}

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To calculate r²

The percentage of the variance is;

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r^2 = \dfrac{2.2450^2}{2.2450^2 + 14}

r^2 = \dfrac{5.040025}{5.040025+ 14}

r^2 = 0.2647

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2 years ago
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