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3 years ago

Find the midpoint of AC is at -2 and C is at 3 on a number line

Mathematics

1 answer:

Bad White [126]3 years ago

3 0

2c3 Because when you look at it when you look at the question if I do that and then you were at the AC is at the two and see is that the three on the number line then you would add that on and you’ll get your answer

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Imagine your friend is writing an argument to convince adults that they should allow teens to own and use smartphones. Read her

Blababa [14]

I think it is the 2nd one

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3 years ago

A trucking firm suspects that the mean lifetime of a certain tire it uses is more than 30,000 miles. To check the claim, the fir

grandymaker [24]

Answer:

We conclude that the lifetime of tires is less than 30,000 miles.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 30,000 miles

Sample mean, $\bar{x}$ = 29,400 miles

Sample size, n = 54

Alpha, α = 0.05

Population standard deviation, σ =1200 miles

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30000\text{ miles}\\H_A: \mu < 30000\text{ miles}$

We use One-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{29400 - 30000}{\frac{1200}{\sqrt{54}} } = -3.6742$

Now, $z_{critical} \text{ at 0.05 level of significance } = -1.64$

Since,

$z_{stat} < z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis.

Thus, we conclude that the lifetime of tires is less than 30,000 miles.

4 0

3 years ago

Find the distance between

Dmitry_Shevchenko [17]

Answer:

minus 15 by 4

Step-by-step explanation:

minus 9 by 4 minus 3 by 2 lcm then add

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3 years ago

Select ALL the answers that are correct.

elixir [45]

Answer:

A,C

Step-by-step explanation:

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3 years ago

What does the division fact 30 ÷ 5 = 6 mean?

Sholpan [36]

The division fact means that 5 can go into 30 6 times.

hope this helped!!!!

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3 years ago