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SpyIntel [72]
4 years ago
10

If f(x) and f^-1(x) are inverse functions of each other adn f(x) - 2x+5, what is f^-1(8)?

Mathematics
2 answers:
Alja [10]4 years ago
8 0

Answer:

3/2

Step-by-step explanation:

f(x) = 2x+5

f⁻¹(2x+5) = x

2x+5 = 8 => 2x+5 = 8 => 2x = 3 =>

=> x = 3/2

=> f⁻¹(8) = 3/2

lilavasa [31]4 years ago
4 0

Answer:

f^{-1}(8)=1.5

Step-by-step explanation:

If y=f(x)=2x+5, to find the inverse function express x n terms of y:

y=2x+5\\ \\2x=y-5\\ \\x=\dfrac{y-5}{2}

Now, change y into x and x into y:

y=\dfrac{x-5}{2}\\ \\f^{-1}(x)=\dfrac{x-5}{2}

Substitute x=8 into f^{-1}(x) expression:

f^{-1}(8)=\dfrac{8-5}{2}\\ \\f^{-1}(8)=\dfrac{3}{2}=1.5

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Answer:

C. 12x² + 8x + 25

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A. 12x² + 15

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Hypotenuse = 8x²

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Perimeter of the triangle = hypotenuse + height + base

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7 0
3 years ago
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kenny6666 [7]

Answer:

Store C

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6 0
3 years ago
!!HELP!! <br> IM SO CONFUSED PLS HELP IK ITS D U M B BUT HELPPPPPPP ITS 3 AM HELP THE MATH IS HARD
Lapatulllka [165]

Answer:

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HOPE IT'S HELPFUL.

4 0
2 years ago
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Jason is building a 1 : 180 scale model of a real castle. his model has a rectangular base that is 3 feet wide and 4 feet long.w
balu736 [363]
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3 0
3 years ago
Hill in the blank: Type your answer in the box and then clichWhat is the value of n?144eAnswer:
Inessa05 [86]
The correct answer is 95°.

To solve for n, you can start by finding the measures of the triangle's interior angles. Knowing that a straight line measures 180°, you can subtract the given values from 180° to find the measures of the respective supplementary interior angles. That would give you 59° (180-121) and 36° (180-144).

Now, knowing that the measure of all the interior angles of a triangle is also 180°, you can add the two interior angles you know (59+36) and subtract those from 180°. Doing so would give you the measure of the missing third angle, which is 85°.

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5 0
4 years ago
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