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Which of the following functions has the solution (3, -2)?

Select all that apply.

y=-2x+4

f(x)=-x+2

f(x)=-23x

f(x)=3x−2

f(x)=4x+11

f(x)=6x−20

 Oct 12, 2016
 #1
avatar+233 
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help! 

 Oct 12, 2016
 #2
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Which of the following functions has the solution (3, -2)?

Select all that apply.

(1) y=-2x+4

(2) f(x)=-x+2

(3) f(x)=-23x

(4) f(x)=3x−2

(5) f(x)=4x+11

(6) f(x)=6x−20

 

(3,2)or x=3and y=f(x)=2

 

(1)y=2x+4|x=3y=2×3+4y=6+4y=2Yes y=f(x)=2

 

(2)f(x)=x+2|x=3f(x)=3+2f(x)=1No f(x)=1

 

(3)f(x)=23x|x=3f(x)=23×3f(x)=69No f(x)=69

 

(4)f(x)=3x2|x=3f(x)=3×32f(x)=92f(x)=7No f(x)=7

 

(5)f(x)=4x+11|x=3f(x)=4×3+11f(x)=12+11f(x)=23No f(x)=23

 

(6)f(x)=6x20|x=3f(x)=6×320f(x)=1820f(x)=2Yes y=f(x)=2

 

 

laugh

 Oct 12, 2016
edited by heureka  Oct 12, 2016

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