SOLUTION: Determine whether (2,7) is a solution of 6x+9y=20. Is (2,7) a solution of the equation? Please advise. Find the indicated outputs for f(x) =4x^-4x. f=(0), f=(-1), and f=(2). Thank

Question 311066: Determine whether (2,7) is a solution of 6x+9y=20. Is (2,7) a solution of the equation? Please advise. Find the indicated outputs for f(x) =4x^-4x. f=(0), f=(-1), and f=(2). Thank you.
Found 3 solutions by Fombitz, JBarnum, stanbon:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
Plug it in and find out.

That's obviously false, hence (2,7) is not a solution.
.
.
.

Answer by JBarnum(2146)   (Show Source): You can put this solution on YOUR website!
plug in the point
6(2)+9(7)=20
12+63=20
75=20
nope doesnt work
4x-4x=0 so doesnt matter what x is the equation will = 0
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
Determine whether (2,7) is a solution of 6x+9y=20. Is (2,7) a solution of the equation? Please advise.
Substitute x = 2 and y = 7 to see if you get a true statement:
6*2 + 9*7 = 20
12 + 63 = 20
75 = 20
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Not true; so (2,7) is not a solution of the equation.
=======================================================
Find the indicated outputs for f(x) =4x^2-4x.
f(0) = 4*0 -4*0 = 0
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f(-1)= 4(-1)^2 - 4(-1) = 4 +4 = 8
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f(2)= 4(2^2) -4*2 = 4*4 - 4*2 = 8
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Thank you.
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Cheers,
Stan H.
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