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1 year ago

If f (x) = x² - 7, evaluate the following: f(12) f(-7)

Mathematics

1 answer:

Julli [10]1 year ago

7 0

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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Vikki [24]

Answer:

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Step-by-step Explanation:

Given:

∆WXY

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Required:

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Solution:

Find the length of XY using Law of Sines

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X = 130°

x = WY = 31 mm

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w = XY = ?

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Multiply both sides by sin(24) to solve for x

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$Area = 112.1 m^2$ (to nearest tenth).

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Keywords: Tax, tax calculation

Learn more about tax calculation at:

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