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Natalija [7]
2 years ago
10

In Ethiopia there are 20 premier league soccer teams. in one round how many games are there?​

Mathematics
1 answer:
frosja888 [35]2 years ago
4 0

Answer:

190 games

Step-by-step explanation:

²⁰C₂ = 20!/[(20 - 2)! * 2!] = 190

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Answer:

14

Step-by-step explanation:

the sum of the terms in the angle is 6x+6. Since the angles ate complementary their sum is 90 so you set the aforementioned sum equal to 90. You then solve for x and get 14.

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Write a system of two linear equations showing the distance each animal can
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Lion: y = 50x - 295

Elephant: y = 25x - 147.5

Step-by-step explanation:

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Let s be the region enclosed by the graphs of y x = 2 and 2 y x = 2 for 0 1. £ £ x what is the volume of the solid generated whe
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3 years ago
A researcher wanted to test the claim that, "Seat belts are effective in reducing fatalities." A simple random sample of front-s
GREYUIT [131]

Answer:

z = \frac{0.00206 -0.0110}{\sqrt{\frac{0.00206*(1-0.00206)}{7765} +\frac{0.0110*(1-0.0110)}{2823}}}= -4.405

Now we can find the p value since we are using a left tailed test the p value would be:

p_v = P(z

Since the p value is very low compared to the significance level of 0.05 we have enough evidence to reject the null hypothesis and then the best conclusion would be:

B) Since p <a, we conclude that this data shows that seat belts are effective in reducing fatalities.  

Step-by-step explanation:

We have the following info given from the problem

X_1 =31 number of people killed with occupants not wering seat belts

n_1 = 2823 number of people not wearing seat belts

\hat p_1 =\frac{31}{2823}=0.0110 represent the estimated proportion of people killed not wearing seatbelts

X_2 =16 number of people killed with occupants using wering seat belts

n_2 = 7765 number of people using wearing seat belts

\hat p_2 =\frac{16}{7765}=0.00206 represent the estimated proportion of people killed  wearing seatbelts

We want to check if seat belts are effective in reducing fatalities, so we want to test the following system of hypothesis:

Null hypothesis: p_2 \geq p_1

Alternative hypothesis: p_2

The statistic for this case is given by:

z = \frac{\hat p_2 -\hat p_1}{\sqrt{\frac{\hat p_1 (1-\hat p_1)}{n_1} +\hat p_2 (1-\hat p_2)}{n_2}}}

And replacing we got:

z = \frac{0.00206 -0.0110}{\sqrt{\frac{0.00206*(1-0.00206)}{7765} +\frac{0.0110*(1-0.0110)}{2823}}}= -4.405

Now we can find the p value since we are using a left tailed test the p value would be:

p_v = P(z

Since the p value is very low compared to the significance level of 0.05 we have enough evidence to reject the null hypothesis and then the best conclusion would be:

B) Since p <a, we conclude that this data shows that seat belts are effective in reducing fatalities.  

8 0
3 years ago
What are all possible values for x in the equation x^3=375?
melisa1 [442]

Answer:

x=5\sqrt[3]{3} or 7.21

Step-by-step explanation:

x³ = 375

You have to take the square root and have the index 3:

You have to have the index 3 because x is cubed and you have to get rid of the cubed sign since a normal square root is for when the exponent is 2:

\sqrt[3]{x^3} =\sqrt[3]{375} \\x=5\sqrt[3]{3}

In decimal form (rounded to hundredths):

7.21

8 0
3 years ago
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