Writing and interpreting functions

Given f(x) = $x^2+4x-5$ 
g(x) = 2x - 1 ,
h(x) = x + 4
What is ( $f\ \circ\ g$ )(-2)?

Given f(x) = 2x and g(x) = x² + 3 , find f(g(x)).

• x² + 2x + 3

• 4x² + 3

• 2x² + 3

• 2x² + 6

Find gf and fg of the following when

f : x → 2x + 1 and g: x → 2-x^²

• gf: x → 4x + 3 and fg: x → 5x - 2

• gf: x → 1- 4x - 4x² and fg: x → 5 - 2x²

• gf: x → 3x² - 2x + 3 and fg: x → 2x +7

• gf: x → 4x²-2x -4 and fg: x → 2-5x

• 16
• 4
• -4
• None of these.

Given f(x) = $x^2+4x-5$ 
g(x) = 2x - 1 ,
h(x) = x + 4
What is ( $h\ \circ\ g$ )(x)?

• 2x+7

• 2x+3

f(x) = 3x + 10

g(x) = x - 2

Find f(g(5))

• 19

• 23

• -10

• None of these.

Given f(x) = 3x² - 2x + 1 and g(x) = x - 4, find (f⋅g)(x). 

• 3x³ - 10x² - 7x - 4
• 3x³ - 14x² + 9x - 4
• 3x² - x - 3
• 3x³ + 14x² - 9x - 4

• 22

• -50

• 182

• -210