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2 years ago

Free brainist for right anwsers

Mathematics

2 answers:

geniusboy [140]2 years ago

6 0

Answer:

i need the points sorry!

Step-by-step explanation:

ignore me

Dmitry [639]2 years ago

4 0

The answer to the question is B

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Expression 1:

e-lub [12.9K]

1. Did it mentally think it’s 16. Make sure to yield to order of operations.
2. Because none of the operations are multiplication or division, parenthesis can be put anywhere that isn’t between exponents and it will yield 22.

7 0

2 years ago

An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n

kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 232 V

Sample mean, $\bar{x}$ = 231.5 V

Sample size, n = 66

Sample standard deviation, s = 2.19 V

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 232\\H_A: \mu \neq 232$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{231.5- 232}{\frac{2.19}{\sqrt{66}} } = -1.8548$

Now,

$t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = \pm 1.9971$

Since,

$|t_{stat}| > |t_{critical}|$

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

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2 years ago

A right triangle has a leg length of 21 inches and a hypotenuse length of 29 inches. What is the length of the other leg?

Shalnov [3]

Answer:

Step-by-step explanation:

Pythagorean Theorem: a^2 + b^2 = c^2

21^2 + b^2 = 29^2

441 + b^2 = 841

Subtract 441 on both sides to get b^2 = 400

Take the square root of both sides to get b = 20

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3 years ago

Can you guys help this is a test plz help

Oksanka [162]

Answer:

141.6

Step-by-step explanation:

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3 years ago

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1/3x = 1.5<br><br> what does x equal to ?

IRISSAK [1]

Answer:

4.5

Step-by-step explanation:

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2 years ago

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