Math Math Algebra and Functions 3

Question 1

What is the value of x in the proportion 4/x = 8/20?

Accepted Answer

10

Answer

5

Answer

40

Answer

8

Question 2

Simplify the expression: (2x³)(3x²)

Accepted Answer

6x⁵

Answer

6x⁶

Answer

5x⁵

Answer

6x

Question 3

If y varies directly with x and y = 15 when x = 3, what is y when x = 7?

Accepted Answer

35

Answer

21

Answer

45

Answer

28

Question 4

What is the domain of f(x) = √(x − 4)?

Accepted Answer

x ≥ 4

Answer

x > 4

Answer

x ≤ 4

Answer

All real numbers

Question 5

Which of the following represents an exponential function?

Accepted Answer

y = 3 × 2ˣ

Answer

y = 3x²

Answer

y = 3x + 2

Answer

y = x³

Question 6

Solve for x: |2x − 4| = 10

Accepted Answer

x = 7 or x = −3

Answer

x = 7 or x = 3

Answer

x = 3 or x = −7

Answer

x = −7 or x = −3