SOLUTION: Do I replace the (x) with 15? g(x) = -2x -3 Find x if g(x) = 15

Algebra.Com
Question 1135377: Do I replace the (x) with 15?
g(x) = -2x -3
Find x if g(x) = 15
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620)   (Show Source): You can put this solution on YOUR website!
---------------------------------------
Do I replace the (x) with 15?
g(x) = -2x -3
Find x if g(x) = 15
---------------------------------------


Read the function definition and the question again. The meaning is clear.


Do you replace x with 15?
Why?

What if you did?
, but "Find x if g(x) = 15", means something else. Do you see?

--
--






Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Do I replace the (x) with 15?
g(x) = -2x -3
Find x if g(x) = 15
No!! 

You're given that g(x) = 15, so what you should REPLACE with 15 is g(x), not x. 

RELATED QUESTIONS


Given g(x) = –2x – 5, find g (3a). 

-6a-15
Did I do this... (answered by longjonsilver)

If f(x)=2x^2+3 and g(x)=x-5 find:
a. (f o g)(3)
b. (g o f)(3)
I am unsure as to where... (answered by drcole)

15. If f(x) =2x2+1 and g(x)=x-3, find (f o g)(x).
a. (f o g)(x) = 2x 2 - 17 
b. (f o... (answered by Fombitz)

Let g be the function defined by
g(x) = {- 1/2x+3  if x < 5
       {
       {... (answered by Fombitz)

If g(x) = x+3 and f(x) = x^2+2x-3

Find... (answered by jim_thompson5910)

If f(x)= -4/5x+10 and g(x)= 2x+1, what is... (answered by Alan3354)

Can I get some help please?

Functions and Relations

If f(x)=3x^2-4x+5 and g(x)=4x-3
 (answered by BigToosie)

If g(x)=1-2x, find the value of... (answered by jsmallt9)

If f(x)=2x-1 and g(x)=x^2 find :
1.  g(g(x))
2.  g(f(x))
3.  f(g(x))
4.... (answered by fcabanski)