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3 years ago

You and your mom enter a drawing with 3 different prizes. A total of 10

Mathematics

2 answers:

RUDIKE [14]3 years ago

7 0

Answer:

7/504

Step-by-step explanation:

there are 504 possibilities of your mom winning and 7 out of tjose are the odds of her winning.

Vlada [557]3 years ago

7 0

8/720 is the answer

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Based on the z-statistic of –2.5 for the sample data, should the null hypothesis be rejected? Yes, because the z-statistic lies

ivann1987 [24]

Answer:

No, because z-statistics lies within the critical region.

Step-by-step explanation:

The z value is calculated to determine whether the null hypothesis should be accepted or rejected. The null hypothesis is rejected when the z-value lies outside the critical region. The critical region is determined by the sample data.

6 0

3 years ago

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How to sole linear equations

slega [8]

Answer:

Step-by-step explanation:

I assume you mean simple linear equations, maybe not factoring. Anyhow Ill do a few examples:

1. 2x + 5 = 19

2. 14 - 3x = 23

3. 50x / 5 = 150

1. 2x + 5 = 19

Subtract 5

2x = 14

Divide by 2

x = 7

2. 14 - 3x = 23

Subtract 14 to the other side because we have to isolate the term with x in it

-3x = 9

Divide by -3

x = -3

3. 50x / 5 = 150

Multiply by 5 to isolate the value with x

50x = 750

Divide by 50

x = 15

I dont know if this is what you are looking for but this is general idea of how to solve these types of questions. If you need factoring or help with quadratics then let me know!

8 0

3 years ago

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How can i get my answer for 5+(-34)

julia-pushkina [17]

Hello there.

Answer: ⇒⇒⇒⇒-29

Step-by-step explanation:

Remove parenthesis.

$5-34$

Subtract the numbers.

$5-34=-29$

Hope this helps!

Thank you for posting your question at here on brainly.

-Charlie

4 0

3 years ago

PLEASE HELP ME (Step by step) -20 > -2x + 4

kotykmax [81]

Answer and Step-by-step explanation:

To solve for x, we need to first add 20 to both sides, and then add 2x to both sides.

2x > 20 + 4

Combine like terms.

2x > 24

Divide each side by 2.

x > 12

So, the answer is:

Any value of x that is greater than 12.

#teamtrees #PAW (Plant And Water)

3 0

3 years ago

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The Institute of Education Sciences measures the high school dropout rate as the percentage of 16- through 24-year-olds who are

STALIN [3.7K]

Answer:

We conclude that the proportion of dropouts has changed from the historical value of 0.081.

Step-by-step explanation:

We are given that in 2009, the high school dropout rate was 8.1%. A polling company recently took a survey of 1000 people between the ages of 16 and 24 and found 6.5% of them are high school dropouts.

The polling company would like to determine whether the proportion of dropouts has changed from the historical value of 0.081.

Let p = proportion of school dropouts rate

SO, Null Hypothesis, $H_0$ : p = 0.081 {means that the proportion of dropouts has not changed from the historical value of 0.081}

Alternate Hypothesis, $H_A$ : p $\neq$ 0.081 {means that the proportion of dropouts has changed from the historical value of 0.081}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of high school dropout rate = 6.5%

n = sample of people = 1000

So, test statistics = $\frac{0.065-0.081}{{\sqrt{\frac{0.065(1-0.065)}{1000} } } } }$

= -2.05

Also, P-value is given by the following formula;

P-value = P(Z < -2.05) = 1 - P(Z $\leq$ 2.05)

= 1 - 0.97982 = 0.0202 or 2.02%

Now at 5% significance level, the z table gives critical values between -1.96 and 1.96 for two-tailed test. Since our test statistics does not lies within the range of critical values of z so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region.

Therefore, we conclude that the proportion of dropouts has changed from the historical value of 0.081.

7 0

3 years ago