Algebra
posted by Benjamin .
There is a table of values for the function f. They read:
x=3, f(x)=4
x=4 f(x)=5
x=5 f(x)=6
x=6 f(x)=3
x=7 f(x)=5
x=8 f(x)=7
What is the value of 2f(5)f(4)?
I did this wrong obviously, but what I did was figure out the function of five from the table (4), and multiplied that by 2 to get 8. I then got the function of 4, which was 3. I subtracted 3 from 8 to get 5, but that was not the correct answer, it was 7 according to my answer key. Where did I go wrong?

when x = 5, f(x) = 6
when x = 4, f(x) = 5
2*6  5
12  5
7
Respond to this Question
Similar Questions

computer programming
write a program that can read 10 interger values into an array and find the total for that array in the program , write 3 fiunctions: a function to read values , a function to find the total of element value and a function to print … 
computer programming c++
write a program that can read 10 interger values into an array and find the total for that array in the program , write 3 fiunctions: a function to read values , a function to find the total of element value and a function to print … 
Algebra: Help Please
For the given function, compute the missing values in the following table. f(x) = 8x i got the negatives wrong, but I know how to solve for it. Is there a reason it is wrong? 
Precalculus
The application of one function followed by the application of a second function to the result of the first as in F^1(f(x)) is called composition of functions. The two functions need not be inverse of each other. In a diagram, the … 
math
The application of one function followed by the application of a second function to the result of the first as in F^1(f(x)) is called composition of functions. The two functions need not be inverse of each other. In a diagram, the … 
Calculus, check my answers, please!
Could someone tell me if I'm right, and if not what the correct answer is? 
math
the table below shows some values for the function f. if f is a linear function, what is the value of a+b? 
Math I need help ASAP!
1) Identify the function rule shown in the table. Function Table n  3, 4, 5, 6 y  2, 1, 0, 1 a. y = 2 + n b. y = 5n c. y = 5  n d. not enough information ** 2) What is the values of the function y = 2x  4 for x = 0,1,2 and 3? 
algebra
The Jackson High School gymnastics team sells calendars for their annual fundraiser. The function rule below describes the amount of money the team can raise, where y is the total amount in dollars, and x is the number of calendars … 
Calculus Please Check my answers
f is a function that is differentiable for all reals. The value of f ′(x) is given for several values of x in the table below. The table: x 8,3,0,3,8 f'(x)4,2,0,4,5 If f ′(x) is always increasing, which statement about f(x) …