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Mathematics

1 answer:

Phantasy [73]2 years ago

8 0

Answer:

Step-by-step explanation:

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Pre cal help please

ss7ja [257]

We have the following function

$f(x)=\frac{3}{x+2}-\sqrt{x-3}$

We want to know what is the value of f(x) when x is 19

$f(19)=\frac{3}{19+2}-\sqrt{19-3}=1/7-4=\boxed{-27/7}$

If you have additional questions feel free to ask.

Hope this helps.

7 0

2 years ago

Dr. Stein bought 30 notebooks, 60 pencils and 300 erasers to make identical packages with some notebooks, some pencils and some

SashulF [63]

M.m.c (30, 60, 300)
30, 60, 300|3
10, 20, 100|2
5, 10, 50 |5
1, 2, 10 | ===> 3*2*5 = 30
30 stundents

7 0

3 years ago

Read 2 more answers

A sample of 64 was taken from a population, with the mean of the sample being 119 and the standard deviation of the sample being

Fofino [41]

We have the sample size, sample mean and the sample standard deviation. Since the population standard deviation is not know, we will use t-distribution to find the confidence interval.

The critical t value for 95% confidence interval and 63 degrees of freedom is 1.998.

The 95% confidence for the population mean will be:

$(119-1.998 *\frac{16}{ \sqrt{64} } ,119+1.998 *\frac{16}{ \sqrt{64} }) \\ \\ 
=(115.004, 122.996) \\ \\=(115,123)$

Thus, the 95% confidence interval for the population mean will be (115,123)

So, option A is the correct answer

6 0

2 years ago

1. What is the spinning mo tion of the earth called? = rotation

Tasya [4]

Answer:

Rotation and Revolution are two motions of the earth.

Step-by-step explanation:

The description is in the image below: