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lutik1710 [3]
3 years ago
7

What dose x represent

Mathematics
2 answers:
Aneli [31]3 years ago
8 0
X = 118 apples each student picks
goldenfox [79]3 years ago
5 0
A variable Because of the math question like let’s say 40•12*-* divided by x
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Consider the function f(x)= 2/5x-4
Gre4nikov [31]

Answer: a) \frac{5}{2}x+10=f^{-1}(x)=g(x)

Step-by-step explanation:

Since we have given that

f(x)=\frac{2}{5}x-4

a.) Find the inverse of f(x) and name it g(x).

Let f(x) = y

So, it becomes

y=\frac{2}{5}x-4

Switching x to y , we get

x=\frac{2}{5}y-4

5x=2y-20\\\\5x+20=2y\\\\\frac{5x+20}{2}=y\\\\\frac{5}{2}x+10=y\\\\\frac{5}{2}x+10=f^{-1}(x)=g(x)

b) . Use composition to show that f(x) and g(x) are inverses of each other.

\mathrm{For}\:f=\frac{2}{5}x-4\:\\\\\mathrm{substitute}\:x\:\mathrm{with}\:g\left(x\right)=\frac{5}{2}x+10\\\\=\frac{2}{5}\left(\frac{5}{2}x+10\right)-4\\\\=x

Similarly,

\mathrm{g\left(x\right)=\frac{5}{2}x+10,\:f\left(x\right)=\frac{2}{5}x-4,\:g\left(x\right)\circ \:f\left(x\right)}\\\\\mathrm{For}\:g=\frac{5}{2}x+10\:\mathrm{substitute}\:x\:\mathrm{with}\:f\left(x\right)=\frac{2}{5}x-4\\\\=\frac{5}{2}\left(\frac{2}{5}x-4\right)+10\\\\=x

so, both are inverses of each other.

c) Draw the graphs of f(x) and g(x) on the same coordinate plane.

As shown below in the graph , Since for inverse function we need an axis of symmetry i.e. y=x

And both f(x) and g(x) are symmetry to y=x.

∴ f(x) and g(x) are inverses of each other.


5 0
3 years ago
What are the factors of 4x^2+13x+3?
Katyanochek1 [597]
<span>4x</span>² <span>+ 13x + 3=
4x</span>² + 12x + x + 3 =
4x(x+3) + (x+3) = 
(4x+1)(x+3)
4 0
3 years ago
Solve the equation by factoring:<br> x^3-16x^2+63x=0<br> x <br> 3<br> −16x <br> 2<br> +63x=0
Svetlanka [38]
Can you re order them I don’t understand your problems
3 0
3 years ago
I'll mark you as the brainiest if you get this correct thx xxx This homework is due tomorrow thx sm for your help
N76 [4]

Answer:

8 boxes of pens, 3 boxes of pencils

Step-by-step explanation:

120 is 3 boxes of pencils

120 is 8 boxes of pens

6 0
2 years ago
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Find the solutions below x^2-4 check all that apply
Assoli18 [71]

Answer:(x+2)(x−2)

Step-by-step explanation:Since both terms are perfect squares, factor using the difference of squares formula

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3 years ago
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