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klio [65]
3 years ago
11

25 Points for answer

Mathematics
2 answers:
Luden [163]3 years ago
7 0

Answer: 2

Step-by-step explanation:

First you have to plug in the value for x which is -18 so then you're equation then get y by itself and solve for y. This becomes

-3(-18) -y = 56

54 - y = 56

-54 -54

Y=2

You can check your work by plugging in 18 for x and 2 for y and when you solve the equation your answer should equal 56.

e-lub [12.9K]3 years ago
5 0

Answer: 2 (Brainliest?)

Step-by-step explanation:

-3(-18) -y = 56

54 - y = 56

y= 2

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Find the inverse: f(x)=x+5/3x-1<br><br> f^-1x=
babunello [35]

We have f(x)=\dfrac{x+5}{3x-1}.

To find inverse function f^{-1}(x) we substitute x with f^{-1}(x) and vice-versa to get

x=\dfrac{f^{-1}(x)+5}{3f^{-1}(x)-1}

Now solve for f^{-1}(x). Note that I will use j instead.

x=\dfrac{j+5}{3j-1} \\x(3j-1)=j+5 \\3jx-x=j+5 \\3jx-x-j-5=0 \\3jx-j=x+5 \\j(3x-1)=x+5 \\j=\dfrac{x+5}{3x-1}

So we find that f(x)=f^{-1}.

Hope this helps.

7 0
3 years ago
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Answer:

60 seconds, 7715 feet

Step-by-step explanation:

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To find this we subtract 45.25 from 55.5 and get 10.25 feet per second. Now to find out how many seconds until they'll be at the same altitude we simply divide 615 by 10.25, getting 60 seconds.

For the second part, to find the altitude at this point, we simply multiply the altitude gain of one of the planes per second by the time of 60 seconds to get how much altitude they gained over that time, and add it to the starting altitude. Doing this with plane B we get 45.25*60=2715, and we add that to 5000 to get the final answer of 7715.

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3 years ago
Which expression is equivalent to 81-16x^2
iris [78.8K]
Is should be (9-4x)•(9+4x)
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Step-by-step explanation:

Given Data:

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Base edge of square pyramid = s = 20 inches

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Solution:

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