WILL GIVE BRAINLY PLEASE ANSWER THIS MATHEMATICAL QUESTION STEP BY STEP!!!!!!! (-5 − 2) × (-3)

Mathematics

2 answers:

Oksanka [162]3 years ago

7 0

Answer:

-5-2 = -7 Step 1 from abaolute value quality

-7*(-3) =21 step 2 from absolute value quality

KatRina [158]3 years ago

6 0

Answer:

Step-by-step explanation:

Start with parenthesis:

(-5 -3) x (-3)

-8 x -3

Then multiply:

-8 x -3 = 24

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Step-by-step explanation:

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Colt1911 [192]

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The sample statistics are attached.

First, we need to determine the hypothesis.

The null hypothesis should be: $H_{o} : u_{africa} \geq u_{asia}$ .

The alternative hypothesis should be: $H_{a}: u_{africa}$

The next step is about calculating the t statistics based on the samples. This t test will give the probability value or p-value, which determines if there's enough to reject the null hypothesis. The formula we need to use to find the t-value is: $t=\frac{x_{1}-x_{2} }{\sqrt{\frac{s_{1} ^{2} }{n_{1} } +\frac{s_{2} ^{2} }{n_{2} } } }$

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Therefore, the t-value is -3.2.

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Therefore, according to the table attached, the p-value is less than 0.01, which is less than our level of significance. This result means that the null hypothesis is rejected. In other words, there's enough evidence to say that the life expectancy of people in Africa is less than the life of expectancy of people in Asia.