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Vikki [24]
2 years ago
15

McKenna earns $12 per hour mowing her grandmother yard.

Mathematics
1 answer:
Elden [556K]2 years ago
4 0

Answer:

???

Step-by-step explanation:

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<h3>Solution:</h3>

f(x) =  \sqrt{ {x}^{2} }  - 5 \\  =  > f(4) =  \sqrt{ {(4)}^{2} } - 5 \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \sqrt{16 }   - 5 \\  =  4 - 5 \\  =  - 1 \\ or \\  =  - 4 - 5 \\  =  - 9

<h3>Answer:</h3>

-1 or -9

<h3>Hope it helps</h3>

ray4918 here to help

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2 years ago
15=7-|2x|<br> Solve for x in this absolute value equation.
ivann1987 [24]
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3 years ago
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What is the equation of the line that is perpendicular to the given line and passes through the point (3, 0)?
olga2289 [7]

Step 1

<u>Find the slope of the given line</u>

Let

A(-3,2)\ B(2,-1)

slope mAB is equal to

mAB=\frac{(y2-y1)}{(x2-x1)} \\ \\ mAB=\frac{(-1-2)}{(2+3)} \\ \\ mAB=-\frac{3}{5}

Step 2

<u>Find the slope of the line that is perpendicular to the given line</u>

Let

CD ------> the line that is perpendicular to the given line

we know that

If two lines are perpendicular, then the product of their slopes is equal to -1

so

mAB*mCD=-1\\ mAB=-\frac{3}{5} \\ mCD=-\frac{1}{mAB} \\ mCD=\frac{5}{3}

Step 3

<u>Find the equation of the line with mCD and the point (3,0)</u>

we know that

the equation of the line in the form point-slope is equal to

y-y1=m(x-x1)\\\\ y-0=\frac{5}{3} *(x-3)\\\\ y=\frac{5}{3} x-5

Multiply by 3 both sides

3y=5x-15

5x-3y=15

therefore

the answer is

the equation of the line that is perpendicular to the given line is the equation 5x-3y=15

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