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3 years ago

F(x) = -2x² – 12x – 19

Mathematics

1 answer:

Oliga [24]3 years ago

6 0

Answer:

just figue out 2x2 then the answer subtract 12x then subtrct 191

Step-by-step explanation:

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hram777 [196]

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3 years ago

Only do question 8<br><br> 50 points<br><br> Topic: Percentage

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Answer:

see below

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

A study of 4,430 U.S. adults found that 2,913 were obese or overweight. The 95% confidence interval for the proportion of adults

IrinaK [193]

Answer:

$0.658 - 1.96\sqrt{\frac{0.658(1-0.658)}{4430}}=0.644$

$0.658 + 1.96\sqrt{\frac{0.658(1-0.658)}{4430}}=0.672$

We are 95% confident that the true proportion of adults overweight is between 0.644 and 0.672

Step-by-step explanation:

We can begin founding the estimated proportion of people overweight:

$\hat p =\frac{2913}{4430}= 0.658$

We need to find a critical value for the confidence level using the normal standard distribution. We know that 95% is the confidence level, then the significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The confidence interval for the true population proportion of interest is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

Replacing the data provided we got:

$0.658 - 1.96\sqrt{\frac{0.658(1-0.658)}{4430}}=0.644$

$0.658 + 1.96\sqrt{\frac{0.658(1-0.658)}{4430}}=0.672$

We are 95% confident that the true proportion of adults overweight is between 0.644 and 0.672

6 0

3 years ago

Reflect (-6, -7) in the x-axis thanks:)

GenaCL600 [577]

(-6,7) since it’s the x axis you just change the sign of the y and keep x the same

3 0

3 years ago

Please help! REWARDING BRAINLIEST FOR BEST ANSWER

Elenna [48]

A good formula that I use for triangles is A=bh divides by 2. If you substitute it would be 192=b12 divided by 2. Divide 12 with two or multiply 12 with 1/2(same answer). You divide 192 with 6 because that is the answer of 12 divided by 2. You should get 32. If you multiply 32 with 12 then divide by 2 or multiply 1/2 you should get 192. The answer is 32. I hope that makes sense:)

5 0

4 years ago