math
posted by sarah .
if f(x) = ax + b and f(2) = f(4) then a = ?
i cant seem to figure out if i plug in 2 or 4 into the eq.
i no the answer is 0 but how do i strt?
f(2) = f(4) >
2 a + b  4 a + b >
2 a = 4 a >
(4  2) a = 0 >
2 a = 0 >
a = 0
Respond to this Question
Similar Questions

math
I need help solving these equations 5s+3s2s=48 6m=5m2+m 5d=2d24 you need help or you want someone to solve them for you? 
Maths
f=p(c1)c(p1) sOLVE FOR p f=pcpcp+c pc  cp = 0 So now we have f = p+c Move "p" by itself. fc = p Now we multiply each side by 1 p = cf Let's plug in values for f and c to check. We'll say: f=2 c=3 p=32 p=1 in this case. … 
Math
Could someone please explain this problem to me? 
Algebra 2
Is it possible to solve 2x + 3 =x? I got x= 3, but it doesn't seem to work when you plug it into the original equation to check it.. 
Math (Precal)
I can't seem to figure this out. A ship leaves at noon and travels due West at 20 knots. At 2:00 it changes to N54°W...Find the bearing and the distance FROM port at 3:00 pm. I've looked at this program for a while but can't figure … 
Math
I know this is simple arithmetic but i just cant seem to figure out the proccess in how to figure it out. X = 0.11X + 3.366 i know that X = 3.8 but i don't now how to get it 
Math
Hi, I can't seem to figure out the answer to this problem. Thanks to anyone who can help! *Solve the system of equations. Write your solution(s) in the form (x,y). y = x^2 x^2 + y^2 = 20 
math
Mrs. Grace has 10 sandwiches that are 4 inches in diameter. They can fit exactly into a different box... Need to show work in box, help, can't seem to figure this out 
Physics
A rock is thrown vertically up into the air. It reaches a maximum height 15m above point where it was released. What is its initial velocity? 
Algebra
5. Solve for x in the following system. 6x + 6y = 2 y = x I can't seem to figure this out, can someone give me some steps into solving this?