Question

Given that f(x) = 2x + 1 and g(x) = −5x + 2, solve for f(g(x)) when x = 3....PLEASE HELP

Answer 1

first, replace the x in g(x)by 3 and work it out:-
g(3) = -5(3) + 2

then plug this result into f(x) , 2x + 1

Answer 2

-5(3) + 2 = -15 + 2 = ?

Answer 3

-13

Answer 4

so its -25?

Answer 5

correct now plug this into 2x + 1 and work it out
that's your answer

Answer 6

yes

Answer 7

got it thanks!

Answer 8

yw

Answer 9

@welshfella what is f(g(x))?

Answer 10

f(g(x)) = 2(-5x + 2) + 1

Answer 11

Yes you should explain to the user how to calculate f(g(x)) first before evaluating f(g(3)). The user may need to know how to do that, especially if asked to graph f(g(x)) for example.

Answer 12

@welshfella

Answer 13

yes - point taken