3 years ago

Solve using substitution x-y= 6 4x+2y=36

Mathematics

1 answer:

Elza [17]3 years ago

5 0

X=6+y
4(6+y) +2y=36
24+6y=36
6y=12
Y=2
X=8

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2.<br> Which of the functions below is an inverse of the quadratic function f(x) = x2 - 3 ?

mezya [45]

Answer:

the inverse of the quadratic function $f(x) = x^2 - 3$ is $\mathbf{f^{-1}(x)=\pm \sqrt{x+3}}$

Step-by-step explanation:

We need to find inverse of the quadratic function $f(x) = x^2 - 3$

Let

$y=x^2-3$

Replace x and y

$x=y^2-3$

Now, we will solve for y

Adding 3 on both sides

$x+3=y^2-3+3$

$x+3=y^2$

Taking square root on both sides

$\sqrt{y^2}=\sqrt{x+3}\\y=\pm \sqrt{x+3}$

Now replace y with $f^{-1}(x)$

$f^{-1}(x)=\pm \sqrt{x+3}$

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Cerrena [4.2K]

Based from background knowledge, I believe that the correct answer among all of the given choices would be B.) 38/2. This would give you 19. If I am mistaken, please correct me. But I am definitely positive that this is the right answer.

I hope this is the answer you were looking for and that it helps!! :)

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Alex Ar [27]

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Geometry circles question

CaHeK987 [17]

Answer: 14

----------------------------------------------

Explanation:

Using the intersecting chord theorem, we can say,

AP*PB = CP*PD
(x+2)*6 = 7*x
6x+12 = 7x
6x+12-6x = 7x-6x
12 = x
x = 12

If x = 12, then,
AP = x+2
AP = 12+2
AP = 14

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3 years ago