3 years ago

ASAP PLEASE HELP IM TIMED WILL MARK BRAINLIEST

Mathematics

1 answer:

marishachu [46]3 years ago

7 0

Answer: im sorry that nobody got to you, im having the same problem right now

Step-by-step explanation:

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If f(x) = 2/3x + 9, find f^-1(x)

larisa86 [58]

If $f^{-1}(x)$ is the inverse of

$f(x) = \dfrac23x+9$

then

$f\left(f^{-1}(x)\right) = \dfrac23f^{-1}(x) + 9 = x$

Solve for $f^{-1}(x)$ :

$\dfrac23f^{-1}(x)+9 = x \\\\ \dfrac23f^{-1}(x) = x-9 \\\\ f^{-1}(x) = \dfrac32(x-9) = \dfrac32x-\dfrac{27}2$

which makes D the correct answer.

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3 years ago

I need all these 4 problems

Roman55 [17]

Number 5 is $25. Sorry, I couldn't do the rest.

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3 years ago

7.50 on 250.00 is what percentage

natita [175]

Answer:

the answer is 3 zz

Step-by-step explanation:

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3 years ago

How to decrease 25 by 20%

IrinaK [193]

Firstly you work out 20% of 25 then subtract it.
So 20% of 25 is 5. then you do 25-5 which is 20.

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4 years ago

When twice a number is subtracted from 29 the result is 21 find the number

Gre4nikov [31]

X= a number

29 - 2x= 21
subtract 29 from both sides
-2x= -8
divide both sides by -2
x= 4

CHECK:
29 - 2x= 21
29 - 2(4)= 21
29 - 8= 21
21= 21

ANSWER: The number is 4.

Hope this helps! :)

4 0

3 years ago