Pre cal help please

Mathematics

1 answer:

ss7ja [257]3 years ago

7 0

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.

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3х + 5(1 +7x) = 3х – 30

weqwewe [10]

3x + (5+35x) = 3x -30
38x + 5 = 3x -30
38x = 3x -35
35x = -35
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4 0

3 years ago

Read 2 more answers

This question confuses me help please. :(

Charra [1.4K]

Hi!

First, find the total percent of vehicles with at least 3 people.

15% + 7% + 3% = 25%

Now find 25% of 420

Set up a proportion and cross multiply to solve.

$\frac{x}{420} \frac{25}{100}$

25 * 420 = 10500

10500/100 = 105

The answer is 105 vehicles contained at least 3 people.

Hope this helped! :)

-Peredhel

3 0

3 years ago

How do we put the points (0,7) and (8,-2) into slope intercept form

Vinil7 [7]

The formula for slope intercept form is y=mx+b where x is the slope and b is the y intercept. To find the slope you would have to do -2-7 over 8-0 and that would give you -9/8. That would be your slope. And I think you should be given a graph I’m not sure but if there is look at it and see what point you see on the y axis

6 0

3 years ago

2. In a given population of two-earner male-female couples, male earnings have a mean of $40,000 per year and a standard deviati

Kobotan [32]

Answer: $85,000

Step-by-step explanation:

Given : In a given population of two-earner male-female couples, male earnings have a mean of $40,000 per year and a standard deviation of $12,000.

$\mu_M=40,000\ \ ;\sigma_M=12,000$