Composition of functions Quiz

f(x) = 3x + 10 g(x) = x - 2 Find f(g(-5))

• 19
• 23
• -11

• 31

f(x) = 5x - 9 g(x) = x - 2 Find f(g(x))

• 3x² - 2
• 5x - 19

• 3x + 4
• None of these.

If f(x) = 3x + 5 and g(x) = x² - 4,

what is (f ° g)(x) ?

• 3x² +5

• x² +1

• 3x² +1

• 3x² - 7

If f(x) = 5x and g(x) = 2x-1,

what is the composition f(g(x)) ?

• 10x-1

• 10x-5

• 5x²-1

• 5x²-5

Tags

CCSS.HSF-BF.A.1C

• 9 - √17
• 4
• 2
• √8

Tags

CCSS.HSF-BF.A.1C

• -1
• 1
• -1/3
• -5/3

Tags

CCSS.HSF-BF.A.1C

Given
f(x) = 3x² + 7x and g(x) = 2x² - x - 1, find (f + g)(x).

• 11x² - 1
• 5x⁴ + 6x² - 1
• 5x² + 6x - 1
• 5x² + 8x - 1

Tags

CCSS.HSF-BF.A.1B

f(x) = 2x and g(x) = 2x-7

Find f(2) + g(2).

• -7

• 1

• -1

• 8

If f(x) = x² + 9 and
g(x) = x - 9,
find f(x) - g(x). 

• x²+x+9
• x²-x+9
• x²-x
• x²-x+18

Tags

CCSS.HSF-BF.A.1B

f(x) = 3x + 10

g(x) = x - 2

Find g(f(-10))

• -42

• -26

• -18

• -22