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2 years ago

Answer? I need it for math.

Mathematics

1 answer:

ladessa [460]2 years ago

5 0

Answer:

The answer is D i guess . ( Not completely sure )

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Given the equation given D=M/V if D=2/3 and v = m + 1, then m is what?

VARVARA [1.3K]

Answer:

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

-2(1.7x + 3.1) = 4<br> find x please

katrin2010 [14]

Answer:

x=-3

Step-by-step explanation:

you first distribute -2 then add 6.2 to both sides of the equation the finnaly divide by -3.4 to both side then you will get x

(-2)1.7x+(-2)3.1`

-3.4x-6.2=4

+6.2 +6.2

-3.4x=10.2

-3.4x/-3.4= 10.2/-3.4

x=-3

6 0

2 years ago

Oliver shot 8 free throws at practice, making 6 free throws and missing 2 free throws. If Oliver is equally likely to make a fre

jek_recluse [69]

Answer: Then you turn the 6 to a 4 and the 2 into a 4 also. Because Oliver wanted the free throw and the free throw he missed turn both equal so you divide 8 with 2 and get 4.

7 0

3 years ago

Read 2 more answers

The life in hours of a thermocouple used in a furnace is known to be approximately normally distributed, with standard deviation

Effectus [21]

Answer:

62 is the minimum sample size needed

Step-by-step explanation:

We know that the population is approximately normally distributed so we will use a z-score for 95% confidence, which is 1.96. We are given the population standard deviation of σ = 20, and are given that the error should be 5 or less hours. The fact that it gives us sample data is irrelevant since we are told the population is approximately normally distributed and are given the population standard deviation.

See the attached photo for the calculation of the minimum sample size

8 0

2 years ago

In Pennsylvania the average IQ score is 101.5 The variable is normally distributed and the population standard deviation is know

elena-14-01-66 [18.8K]

Answer:

P-value = 0.0368

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 101.5

Sample mean, $\bar{x}$ = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 101.5\\H_A: \mu> 101.5$

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

Formula:

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

Putting all the values, we have

$z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789$

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, students in Pennsylvania have an IQ that is significantly greater than the state average.

P-value can be calculated with the standard normal table.

P-value = 0.0368

P-value is lower than the significance level.

4 0

3 years ago