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2 years ago

What does a variable all you to do that you couldn't do before

Mathematics

1 answer:

storchak [24]2 years ago

7 0

Variable means things that are kept the same. But also means different

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Which of the following expressions represents the solution to the inequality statement? -x ≤ -7

natta225 [31]

Answer:

the answer is -8 or 7

Step-by-step explanation:

Sorry im not good w negatives...

4 0

2 years ago

What is th resulting true inequality

lorasvet [3.4K]

Answer:

10>-15

Step-by-step explanation:

The given inequality is:

-2<3

The inequality has to be multiplied by -5.

The multiplication is same as multiplying a normal equation with a number. The only difference is that the sign of inequality is changed when it is multiplied with a negative number.

So,

-2(-5) < 3(-5)

10>-15

So the correct answer is the last option ..

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2 years ago

Incline Electronics produces three different products in a plant that is open 40 hours per week. Each product requires the follo

Paladinen [302]

Answer:

is thier any way you can take a picture of what the problem is cause alot of the equation are not adding up the way you put them

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1 year ago

What is the scale factor?

Fed [463]

Answer:

Step-by-step explanation:

it literally doubles in size

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2 years ago

Read 2 more answers

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.

4 0

2 years ago