Functions - Quick Check

Evaluate:
(f+g)(x)
f(x)=x+5
g(x)=-3x-6

• -4x-1
• -2x-1
• -4x-11
• -2x-11

Tags

CCSS.HSF-BF.A.1B

When 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)=x³-3x
g(x)=-4x+1
Find f(x)*g(x)

• -4x³-5x²-3
• -4x³+2x²-3x
• -4x⁴+x³+12x²-3x
• -4x^4-x³+12x²⁺3x

Tags

CCSS.HSA.APR.A.1

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

• 3x + 4 
• 3x - 4
• 3x + 8
• None of these.

Tags

CCSS.HSF-BF.A.1C

g(a) = 4a + 1

h(a) = -3a + 2

Find g(h(1))

• 3

• -3

• 21

• -21

Tags

CCSS.HSF-BF.A.1C

What is the inverse of the function
f(x) = 2x + 4   ?

• f^-1(x) = 4(x -2)
• f^-1(x) = (x-4)/2
• f^-1(x) = x/2 - 4
• f^-1(x) = x/4 + 2

Tags

CCSS.HSF-BF.B.4A