F(x)= 3x-40. If F(a)=8, what is the value of a

[From: ] [author: ] [Date: 11-06-08] [Hit: ]

right? But what the question is really asking you to do is to set 3x-40 equal to 8,Hope this helps! :)-you have to add 40 to the the 8 and that drops the negativethen divide by 3.x is 16.end of story.......

I got -16 but it says 16 was the right answer ._.

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You probably plugged in 8 for x, right? But what the question is really asking you to do is to set 3x-40 equal to 8, so:

3x-40= 8
3x=48
x=16

Hope this helps! :)

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you have to add 40 to the the 8 and that drops the negative then divide by 3. and you get +16

3A-40=8
+40=+40
add 40 to both sides
3A=48
/3=/3
divide 3 from both sides
A=16

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F(x)= 3x-40
F(a)=3(a)-40
8=3a-40
3a=8+40
3a=48
a=48/3
a=16

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f(a) = 3a- 40 = 8

3a-40 =8
3a = 8+40
3a = 48
a = 16

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u gonna let 3x -40 = 8
3x = 48
x is 16.
end of story.

1

keywords: value,40.,the,what,If,is,of,F(x)= 3x-40. If F(a)=8, what is the value of a

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