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LiRa [457]
2 years ago
9

If f(x) = 2x, then f -(x) = Please help

Mathematics
1 answer:
Sonja [21]2 years ago
5 0

Answer:

f^{-1}(x)= \frac{1}{2}x

Step-by-step explanation:

Given

f(x) = 2x

Required:

Find f^{-1}(x)

f(x) = 2x

Replace f(x) with y

y = 2x

Swap both variables

x = 2y

2y = x

Make y the subject

y= \frac{1}{2}x

Replace y with f-1(x)

f^{-1}(x)= \frac{1}{2}x

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Step-by-step explanation:

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Claires mother is 4 years more than twice claires age
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Please help with this math question
blagie [28]

Answer:

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8 0
3 years ago
1. Find the distance from point P to QS
12345 [234]

Answer:

5.7 units

Step-by-step explanation:

The distance from point P to QS is the distance from point P (1, 1) to the point of interception R(-3, 5).

Use distance formula to calculate distance between P and R:

PR = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

Let,

P (1, 1) = (x_1, y_1)

R(-3, 5) = (x_2, y_2)

Plug in the values into the formula.

PR = \sqrt{(-3 - 1)^2 + (5 - 1)^2}

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4 0
3 years ago
The sum of 2 numbers is 50. The sum of 1/4 of the first number and 2/3 of the second number is 25.What are the numbers?
tino4ka555 [31]

Answer:

First number: 20

Second number: 30

Step-by-step explanation:

First#:   x

Second#:   y

Constraints:

   x + y = 50      

   1/4x + 2/3y = 25

Isolate variable y:

   x + y = 50    

  -1/4 (x + y = 50 )

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  Add equations the two equations to eliminate x:

    -1/4x - 1/4y = -12.5

     1/4x + 2/3y = 25

  _________________

       5/12y = 12.5

           5y = 150

              y = 30

Substitution to find x:

       x + y = 50  

       x + 30 = 50

              x = 20

6 0
3 years ago
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