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3 years ago

Which expression is equivalent to (x^2-5x)(3x^2+2x-9)

Mathematics

1 answer:

77julia77 [94]3 years ago

6 0

Answer:

x (x - 5) (3 x^2 + 2 x - 9)

3 x^4 - 13 x^3 - 19 x^2 + 45 x

x (x (x (3 x - 13) - 19) + 45)

hope this helps!

☺

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Find the inverse of the following function. Then prove they are inverses of one another.

solmaris [256]

Answer: $\dfrac{x^2+1}{2}$

Step-by-step explanation:

Given

$f(x)=\sqrt{2x-1}$

We can write it as

$\Rightarrow y=\sqrt{2x-1}$

Express x in terms of y

$\Rightarrow y^2=2x-1\\\\\Rightarrow x=\dfrac{y^2+1}{2}$

Replace y be x to get the inverse

$\Rightarrow f^{-1}(x)=\dfrac{x^2+1}{2}$

To prove, it is inverse of f(x). $f(f^{-1}(x))=x$

$\Rightarrow f(f^{-1}(x))=\sqrt{2\times \dfrac{x^2+1}{2}-1}\\\\\Rightarrow f(f^{-1}(x))=\sqrt{x^2+1-1}\\\\\Rightarrow f(f^{-1}(x))=x$

So, they are inverse of each other.

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3 years ago

What is the slope of graphs 6,8 pls

cupoosta [38]

6. 7/3
8. 7/3

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3 years ago

Gavin drank 4 5 liter of water Monday before going jogging. He drank 2 3 liter of water after his jog. How much water did Gavin

Hoochie [10]

Answer:

<h2>8.0 liters</h2>

Step-by-step explanation:

The question is not well-formatted, this is supposed to be the correct format

<em>Gavin drank 4.5 liter of water Monday before going jogging. He drank 2.3 liter of water after his jog. How much water did Gavin drink altogether? Write your answer as a mixed number.</em>

Given

we are told that he first drank 4.5 liters of water before jogging

after jogging he drank 2.3 liters

Required

Total amount of water drank

=4.5+3.5

=8.0liters

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2 years ago

What is 12- (-8) +7 in integers

Irina-Kira [14]

Answer:

12+8+7=27

Step-by-step explanation:

just normal addition

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1 year ago

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monitta

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3 years ago