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Anestetic [448]
3 years ago
9

A function f (x)=-8x^2. What is f (-3)?

Mathematics
2 answers:
Sveta_85 [38]3 years ago
8 0
F(x)= -8x²

f(-3)= -8* (-3)²

f(-3)= -8 * 9

f(-3)= -72
nadya68 [22]3 years ago
4 0
<span>f(x) = -8x²

To find the value of f(-3), put -3 in place of 'x' in the definition of the function.</span>

f(-3) = -8(-3)²

f(-3) = -8(9) = <em><u>-72</u></em>
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Please help with math question! This question is stressing me out (View Image)
TEA [102]
To find the volume of this one we need to break it down 
now i see half of a cylinder and rectangle:)
but first lets find the volume of the rectangle...
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in this case...
length = 10in
width = 6 in 
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lets solve:)
10 x 6 x 8 = 480
or we write it like this 
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now time to find the volume of the half cylinder:)
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so lets plug in our values just like our formula said:)
3.14 x 25 x 6 
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</span>now since we found an entire cylinder and we only want half of a cylinder lets divide our answer in half
471 ÷ 2 = 235.5
so we write it like this 235.5units³
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I hope this helped and everyone learned something new
anyways don't forget to
MARK ME BRAINLIEST! :D
3 0
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