SOLUTION: F(x) = -5x + 11 and f(n) = 21, what is the value of n?

Algebra.Com
Question 1165120: F(x) = -5x + 11 and f(n) = 21, what is the
value of n?

Answer by Boreal(15235)   (Show Source): You can put this solution on YOUR website!
-5n+11=-21
-5n=10
n=-2
check
f(-2)=(-5)(-2)+11=21

RELATED QUESTIONS

What is the value of n if f(x)=-5x+11 and... (answered by jim_thompson5910)
If f(x) = -5x + 11 and f(n) = 21 , what is the value of... (answered by josgarithmetic)
If g(x) = 5x + 11 and f(b) = 21, What is the value of... (answered by Alan3354,ikleyn)
if f(1)=9 and f(n)=-3f(n-1)+n then what is the value of... (answered by ikleyn)
if f(1)=5 and f(n)=-2f(n-1)+2 then what is the value of... (answered by MathLover1)
4^11 x 5^21 = 2 x 10^n what is the value of n using simplified... (answered by AAfter Search)
The function f(x) = x^n/n where n is set of all positive integers and x belongs to open... (answered by ikleyn)
let f(x)=x^2+3x and g(x)=2x. If f(n)=28, what is the value of... (answered by robertb)
f(n)= 3*f(n/2) - 4 when n is even and f(1) = -3. a. What is the value of f(4)? (answered by jim_thompson5910)