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3 years ago

If f(x)=x^2-1 and g(x)=x+2 then g(f(x)=

Mathematics

2 answers:

Nana76 [90]3 years ago

7 0

Answer:

Step-by-step explanation:

If f(x)=x^2-1 and g(x)=x+2 then g(f(x))= g(x²-1) = (x²-1)+2= x²+1

vlada-n [284]3 years ago

4 0

Answer:

Step-by-step explanation:

Just plug the f(x) function into x for g(x). Then solve.

g(f(x))=(x^2-1)+2=x^2+1

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5/8=n-2/10<br><br> 9/x=10/x-7<br><br> p+9/p=3/10

lesya692 [45]

Download photo math for equations like this, it will also give you it step by step :)

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3 years ago

A graph of a quadratic function is shown below.

stira [4]

Answer:

d. (10,800)

Step-by-step explanation:

Vertex appears to be at x = 10

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3 years ago

Add (11x + 2) + (9x - 4).

trasher [3.6K]

11x + 2 = 13x, 9x - 4 = 5x, 5x + 13x = 18x

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3 years ago

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How is 3/4 related to 75%

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Answer:

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Step-by-step explanation:

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3 years ago

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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

gtnhenbr [62]

Answer:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

Step-by-step explanation:

Let's define some notation

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=58.2$ represent the population standard deviation

n represent the sample size

$ME =1$ represent the margin of error desire

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =+1 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance would be $\alpha=0.01$ and the critical value $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

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3 years ago