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Pani-rosa [81]
3 years ago
14

What is the solution to the system x + y = 5 and 3x - y = 3?

Mathematics
1 answer:
solong [7]3 years ago
7 0
The answer is (2,3)
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If f (x) = x² - 7, evaluate the following: f(12) f(-7)
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Answer: f(12) = 137, f(-7) = 42

Step-by-step explanation: In a function, what you want to do is plug in the value they give you for x. This means you substitute x with the value they are looking for.

In this case, they are looking at 12 and -7. Let's do 12 first.

The equation becomes (12^2) - 7. 12^2 is 144, and 144-7 is 137.

Now we do -7. The equation becomes (-7)^2 - 7. -7^2 is 49, and 49 - 7 is 42.

Hope this helped!

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A cube has a volume of 64 cubic feet. The surface area of the cube is?
oee [108]

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The surface area is A≈96ft²

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I think it is 42ft

Step-by-step explanation:

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Help me plsss thankyouuuu
Nina [5.8K]

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a) 231

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210*.10 = 21. 21+210 = 231

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