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gayaneshka [121]
3 years ago
5

Please help me with this.

Mathematics
2 answers:
Volgvan3 years ago
8 0

Answer:

<h2>1. x - 2y = -6</h2><h2>2. x + 3y = 0</h2>

Step-by-step explanation:

The Standard form of an eqaution of a line:

Ax+By=C

<h2>1.</h2>

y=\dfrac{1}{2}x+3           <em>multiply both sides by 2</em>

2y=2\!\!\!\!\diagup^1\cdot\dfrac{1}{2\!\!\!\!\diagup_1}x+(2)(3)

2y=x+6           <em>subtract </em><em>x</em><em> from both sides</em>

-x+2y=x-x+6

-x+2y=6           <em>change the signs</em>

x-2y=-6

<h2>2.</h2>

y-2=-\dfrac{1}{3}(x+6)           <em>multiply both sides by 3</em>

3y-(3)(2)=3\!\!\!\!\diagup^1\cdot\left(-\dfrac{1}{3\!\!\!\!\diagup_1}\right)(x+6)

3y-6=-(x+6)

3y-6=-x-6            <em>add 6 to both sides</em>

3y-6+6=-x-6+6

3y=-x             <em>add </em><em>x</em><em> to both sides</em>

x+3y=-x+x

x+3y=0

GalinKa [24]3 years ago
6 0

Answer:

<u><em>-x+2y=6   and   x+3y=0</em></u>

Step-by-step explanation:

Ax+By=C

y=1/2 x+ 3

y= x+6/2

2y=x+6

-x+2y=6------------1

y-2=-1/3(x+6)

3(y-2)= -(x+6)

3y-6=-x-6

3y+x=-6+6

x+3y=0------------2

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IrinaK [193]

one way is to solve for the invers of the first function

remembe, to solve, replace f(x) or g(x) with y, switch x and y, solve for y and replace it with f⁻¹(x)


A.

f(x)=x/2+8

y=x/2+8

x=y/2+8

x-8=y/2

2x-16=y

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nope, not A



B.

f(x)=3x³+16

y=3x³+16

x=3y³+16

x-16=3y³

(x-16)/3=y³

∛((x-16)/3)=y

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nope, not the same

not B


C.

f(x)=18/x-9

y=18/x-9

x=18/y-9

x+9=18/y

y(x+9)=18

y=18/(x+9)

f⁻¹(x)=18/(x+9)

correct, the answer is C




answer is C



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you have been given an engine repair job that has a job time of 7 hours how many minutes should you allow for your job?​
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Step-by-step explanation:

Given

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3 years ago
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enot [183]

Answer:

1 positive solution (and 1 negative)

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Step-by-step explanation:

so, it is

x² + 2x + 7 = 21

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the general solution to such a quadratic equation is

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