If f(x) = 6x - 4, what is f(x) when x = 8?
2, 16, 44, 52

Solution:

Given: Function f(x) = 6x - 4

We have to find f(x) when x = 8

To find f(x), put x = 8

f(x) = (6 × 8) - 4

f(x) = 48 - 4

f(x) = 44

Therefore, the value of f(x) when x = 8 is 44.

Example: If f(x) = 2x - 1, what is f(x) when x = 3?

Solution:

Given: f(x) = 2x - 1

We have to find f(x) when x = 3

To find f(x) put x = 3

f(x) = (2 × 3) - 1

f(x) = 6 - 1

f(x) = 5

Therefore, f(x) when x = 3 is 5.

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If f(x) = 6x - 4, what is f(x) when x = 8?

Summary:

If f(x) = 6x - 4, then the value of f(x) when x = 8 is 44.