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3 years ago

If x=-2 what is y when y=3x+1?

Mathematics

1 answer:

ddd [48]3 years ago

7 0

Answer:

-5

Step-by-step explanation:

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Question 1

sertanlavr [38]

Answer:

I know that the slope is 2 because the rate of change is the slope but i need the graphs to determine the rest of the answer.

Step-by-steI kmp explanation:

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3 years ago

If you get 1 dollar every 2 week how many weeks will it take to get 800

Alchen [17]

$1 = 2 weeks

<u>Multiply by 800:</u>

$1 x 800 = 2 x 800 weeks

$800 = 1600 weeks

Answer: You need <u>1600 weeks </u>to get $800

5 0

3 years ago

In a sample of 100 steel canisters, the mean wall thickness was 8.1 mm with a standard deviation of 0.5 mm. Someone says that th

Travka [436]

Answer:

This statement can be made with a level of confidence of 97.72%.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 8.1 mm

Standard Deviation, σ = 0.5 mm

Sample size, n = 100

We are given that the distribution of thickness is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling:

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{0.5}{\sqrt{100}} = 0.05$

P(mean thickness is less than 8.2 mm)

P(x < 8.2)

$P( x < 8.2)\\\\ = P( z < \displaystyle\frac{8.2 - 8.1}{0.05})\\\\ = P(z < 2)$

Calculation the value from standard normal z table, we have,

$P(x < 8.2) =0.9772 = 97.72\%$

This statement can be made with a level of confidence of 97.72%.

8 0

4 years ago

What is the probability that an individual, selected at random, will score below the mean on any normally distributed characteri

dedylja [7]

Answer:

the probability that an individual, selected at random, will score below the mean on any normally distributed characteristic is just about 0.5.

Step-by-step explanation:

This probability in normal distribution corresponds to z-score of 0. Using normal distribution tables.

P(z < 0) = 1 - P(z ≥ 0) = 1 - 0.5 = 0.5

Which is very logical, to score below the mean on a normal distribution, the probability is just less than 0.5.

3 0

3 years ago

Helpp meeee pleaseeee

forsale [732]

Answer:

x≈49.457

y≈40.543

using trigonometry

Step-by-step explanation:

you basically jump type in the calculator shift then press the (sin/cos/tan) then put the ratio

4 0

3 years ago

If x=-2 what is y when y=3x+1?​

If x=-2 what is y when y=3x+1?