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2 years ago

Find the inverse of the function y = x2 – 12

Mathematics

1 answer:

vivado [14]2 years ago

7 0

Answer: $y=\sqrt{x+12}$

Step-by-step explanation:

I hope you mean y = x² - 12 and not y = 2x - 12.

You switch the y and x variables:

x = y² - 12

And solve for y:

x + 12 = y²

$y=\sqrt{x+12}$

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8.5% tax on $90 purchase

Vladimir [108]

Answer:

$97.65

Step-by-step explanation:

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3 years ago

Read 2 more answers

Given a population mean of 53.7 with a standard deviation of 1.3 and a sample size

a_sh-v [17]

Answer: A. 0.4899 B. 14

Step-by-step explanation:

If X = random variable

then, the standard deviation of the sampling distribution of X = $\dfrac{\sigma}{\sqrt{n}}$

GIven: $\sigma= 1.2, \n= 6$

The standard deviation of the sampling distribution of X = $\dfrac{1.2}{\sqrt{6}}=0.4899$

B. Let n be the sample size,

$0.325=\dfrac{1.2}{\sqrt{n}}\\\\\Rightarrow\ \sqrt{n}=\dfrac{1.2}{0.325}\\\\\Rightarrow\ \sqrt{n}=3.69230769231\\\\\Rightarrow\ n= (3.69230769231)^2=13.6331360947\approx 14$

Hence, the required sample size = 14

3 0

2 years ago

Prices in a car showroom are going to increase by 7%. How much extra will you have to pay for a car that now cost $14,675

adell [148]

Take the cost and multiply by the percent. (I’m going to convert the percentage into a decimal)

14,675 * 0.07 = 1,027.25

$1,027.25 is how much extra money will have to be paid for the car.

Hope this helps.

8 0

2 years ago

Solve s = n/3 (b+H) for H Answer H=

cluponka [151]

The answer for H is, s=nb+nh÷3
Hope it helps

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3 years ago

Whats an example of a repeated decimals

kirill115 [55]

An example of a repeated decimal would be....
1.321321321321
basically a repeated decimal is a decimal that has a multiple of digits repeating over and over again giving you an infinite divisor.

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3 years ago