If f(x) = 4x + 8.
What is f (9)?
Need help

4(9)+8=44

Step-by-step explanation:

44

Step-by-step explanation:

F(x) = 4x +8    can be rewritten as y= 4x +8   where x is the input and y is hte output. If f(9)  is the output and x is the input , switch x for 9 and solve.

f(9) = 4(9) + 8

f(9) = 36 + 8

f(9) = 44

for the points

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.