Question

what is the value of f(5) for the function f(x)=4x-3

Answer 1

replace x with 5
4(5)-3=17

Answer 2

f(x) = 4x - 3

f(5) = 4(5) - 3

f(5) = 20 - 3

f(5) = 17

Replace 5 for every x in the function

Answer 3

im sorry but im still lost

Answer 4

just replace x for 5

Answer 5

and solve it

Answer 6

f(x) --> f(5) so 5 took the x's place therefore replace every x for 5

Answer 7

Get it hun?

Answer 8

sorta im a little on the slow side sadly

Answer 9

Hm, k.

So it says that f(x) is f(5)

So, in f(x) = 4x - 3

I replaced 5 for x, so in f(x) it becomes f(5) and because 4 is being multiplied by x then I mulitply 4 * 5

Answer 10

Barbie,
Sorry this is confusing. What you have here, f(x)=4x-3, is called a "function."
It tells us what value y=f(x) takes on at the input value x.
"f(5)" requires that we substitute 5 for x in the function.
Thus, f(x)=4X-3 becomes f(5)=4(5)-3 when we substitute 5 for x.
Thus, the function value at x=5 is 4(5)-3, which can be reduced to 20-3, or 17.

Answer 11

Ello's approach is similar and is correct, except that the very last sentence should include, "then I multiply 4*5 and subtract 3 from the result."

Answer 12

Which of the answer options is the correct one?