Mathematics Quiz

If 8x – 8 = 24, what is the value of 6x – 4?

• 15

• 20

• 25

• 30

• 35

If x + y = 0, 4x – 2y = 24, which of the following ordered pairs (x, y) satisfies both equations?

• (4, 3)

• (5, 4)

• (4, –4)

• (4, –6)

• (4, 6)

What is the solution of the following inequality? |x – 10| ≤ 3

• x ≥ 13 ∪ x ≤ 7

• 7 ≤ x ≤ 13

• x ≥ 13

• x ≤ 7

• Set of real numbers

If 4n – 3 ≥ 1, what is the least possible value of 4n + 3?

• 3

• 4

• 7

• 9

• 11

For what value of x is |x – 3| + 3 equal to 0?

• 1

• 2

• no value of x

• –3

• 3

If $ f(x) = 3x + 4(x + 1) + 2 $ then $ f(4x) = \?$

• A. $ 28x + 6 $

• B. $ 16x - 6 $

• C. $ 25x + 4 $

• D. $ 12x + 3 $

• E. $ 12x - 6 $

A line in the xy-plane passes through origin and has a slope of $ \frac{1}{3} $. Which of the following points lies on the line?

• A. (2, 1)

• B. (4, 1)

• C. (9, 3)

• D. (6, 3)

• E. (1, 3)

Which of the following points lies on the line that goes through the points (2, 4) and (4, 5)?

• A. (9, 9)

• B. (9, 6)

• C. (6, 9)

• D. (6, 6)

• E. (6, -6)

John buys a pepper plant that is 6 inches tall. With regular watering, the plant grows 4 inches a year. Writing John’s plant’s height as a function of time, what does the y-intercept represent?

• A. The y-intercept represents the rate of growth of the plant which is 5 inches

• B. The y-intercept represents the starting height of 6 inches

• C. The y-intercept represents the rate of growth of the plant which is 3 inches per year

• D. There is no y-intercept

Calculate $ f(5) \ $ for the following function $ f $. $ f(x) = x^2 - 3x $

• A. 5

• B. 10

• C. 15

• D. 20

• E. 30