Evaluating Functions and Expressions

The video tutorial explains how to evaluate and perform operations on functions F(x) = 8x - 5 and G(x) = 4x^2 + 3. It covers calculating F(2) + G(-3), F(5) - G(4), F(1/4) + F(-2), and F(5/6) - F(3/8) by substituting values into the functions and performing arithmetic operations. The tutorial emphasizes understanding function inputs and outputs, substitution, and arithmetic operations.

What is the expression for f(x) given in the video?

• f(x) = 4x^2 - 3

• f(x) = 4x^2 + 3

• f(x) = 8x - 5

• f(x) = 8x + 5

Tags

CCSS.HSF.IF.A.2

How do you calculate f(2) using the function f(x) = 8x - 5?

• Substitute 2 for x in 4x^2 - 3

• Substitute 2 for x in 4x^2 + 3

• Substitute 2 for x in 8x - 5

• Substitute 2 for x in 8x + 5

Tags

CCSS.HSF.IF.A.2

What is the result of f(2) + g(-3)?

• 55

• 50

• 60

• 45

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

What is the expression for g(x) given in the video?

• g(x) = 4x^2 - 3

• g(x) = 4x^2 + 3

• g(x) = 8x - 5

• g(x) = 8x + 5

Tags

CCSS.HSF.IF.A.2

How do you calculate g(4) using the function g(x) = 4x^2 + 3?

• Substitute 4 for x in 4x^2 - 3

• Substitute 4 for x in 4x^2 + 3

• Substitute 4 for x in 8x - 5

• Substitute 4 for x in 8x + 5

Tags

CCSS.HSF.IF.A.2

What is the result of f(5) - g(4)?

• -32

• -30

• -28

• -26

Tags

CCSS.HSF.IF.A.2

How do you calculate f(1/4) using the function f(x) = 8x - 5?

• Substitute 1/4 for x in 4x^2 + 3

• Substitute 1/4 for x in 4x^2 - 3

• Substitute 1/4 for x in 8x - 5

• Substitute 1/4 for x in 8x + 5

Tags

CCSS.HSF.IF.A.2

What is the result of f(1/4) + f(-2)?

• -26

• -24

• -22

• -20

Tags

CCSS.HSF.IF.A.2

How do you calculate f(5/6) using the function f(x) = 8x - 5?

• Substitute 5/6 for x in 8x + 5

• Substitute 5/6 for x in 8x - 5

• Substitute 5/6 for x in 4x^2 + 3

• Substitute 5/6 for x in 4x^2 - 3

Tags

CCSS.HSF.IF.A.2

What is the result of f(5/6) - f(3/8)?

• 10/3

• 11/3

• 12/3

• 13/3

Tags

CCSS.HSF.IF.A.2