unit 8 quiz 2

g(x)=x-1
f(x)=x²-2x
Find (g-f)(x)

• -x²+3x-1
• -x³+x²+5x-4
• x²-3x+1
• x²+3x+1

Tags

CCSS.HSF-BF.A.1B

f(n)=2n+1
g(n)=3n
Find f(n)+g(n)

• 5n+1
• -5n+1
• -2n+1
• -6n-1

Tags

CCSS.HSF-BF.A.1B

f(x) = 4x+8
g(x) = x+3,
Find f(x) * g(x)

• 4x²+24
• 4x²+20x+24
• 4x²+12x+24
• 4x²+4x+24

Tags

CCSS.HSF-BF.A.1B

For the function f(x) = -3x + 3 find f(0).

• 0
• -3
• 3
• -1

Tags

CCSS.HSF.IF.A.2

h(x)=x²-3x-10,
j(x)=3x-2
What is (h/j)(-2)

• -2
• undefined
• 0
• 1

Tags

CCSS.HSF-BF.A.1B

g(x) = -3x+7
h(x) = -x-10
Find g(x)/h(x) and the domain restriction

• -3x+7/-x-10 domain restriction x≠7/3
• -3x+7/-x-10 domain restriction x≠ -7/3
• -3x+7/-x-10 domain restriction x≠10
• -3x+7/-x-10 domain restriction x≠ -10

Tags

CCSS.HSF-BF.A.1B

Find f[g(5)]

• 30

• 242

• 92

• 2

Tags

CCSS.HSF-BF.A.1C

• 9 - √5
• √14
• 16
• 4

Tags

CCSS.HSF-BF.A.1C

A certain county taxes the first $20,000 of a person’s income at a rate of 15% and all income over $20,000 is taxed at a rate of 20%. How much will a person pay if they earn $15,500

• $12,400

• $3100

• $13,175

• $2325

A certain county taxes the first $20,000 of a person’s income at a rate of 15% and all income over $20,000 is taxed at a rate of 20%. Find a function that relates a person’s income to their total taxes paid.

• .2x if 0<x $0<x\le20,000$ and .15x if x $x>20,000$

• .15x if 0 $0<x\le20,000$ and .2x if x $x>20,000$

• .8x if 0 $0<x\le20,000$ and .85x if x $x>20,000$

• .85x if 0 $0<x\le20,000$ and .8x if x $x>20,000$