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2 years ago

Help me please help me

Mathematics

2 answers:

Dmitry [639]2 years ago

8 0

Yes its a function the vertical line test is up and down and nothings hitting pls give me brainliest

ziro4ka [17]2 years ago

7 0

Yes it’s a function

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Please help ASAP!!! I WILL MAKE BRAINLIEST

fredd [130]

Answer: 42.5

Step-by-step explanation:

The answer is 42.5

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3 years ago

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Mt Whitney is 4392m at its highest point. Bombay Beach, California, is 86 m below sea level (-86). What is the difference betwee

scZoUnD [109]

Answer:

4478 m

Step-by-step explanation:

Altitude 1= A1= Mt Whitney is at 4392 m above sea level.

Altitude 2= A2= Bombay Beach is -86

Difference in Altitude= A3=?

A3 = A1 - A2 (because A1 is mentioned first and is the greater altitude)

A3 = 4392 - (-86)

= 4392 + 86

A3 = 4478 m

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2 years ago

Complete the table and graph the function y = 2x + 1 with the domain: 0, 1, 2, 5, 7

Oxana [17]

Answer:

Set it up as a table and insert the numbers one by one

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3 years ago

69+69+69+69+69+69+6?

ss7ja [257]

Answer:

420

Step-by-step explanation:

Simple addition! I double checked!

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2 years ago

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A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. A previous study indicates that the propo

never [62]

Answer:

A sample of 997 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

A previous study indicates that the proportion of left-handed golfers is 8%.

This means that $\pi = 0.08$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a p-value of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.327$ .

How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

This is n for which M = 0.02. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 2.327\sqrt{\frac{0.08*0.92}{n}}$

$0.02\sqrt{n} = 2.327\sqrt{0.08*0.92}$

$\sqrt{n} = \frac{2.327\sqrt{0.08*0.92}}{0.02}$

$(\sqrt{n})^2 = (\frac{2.327\sqrt{0.08*0.92}}{0.02})^2$

$n = 996.3$

Rounding up:

A sample of 997 is needed.

3 0

3 years ago