Math Mastery for Grade 9

What is the solution to the equation 2x + 3 = 11?

• 4

• 5

• 6

• 3

Find the slope of the line that passes through the points (2, 3) and (4, 7).

• 4

• 2

• 3

• 1

What is the area of a triangle with a base of 10 cm and a height of 5 cm?

• 20 cm²

• 30 cm²

• 15 cm²

• 25 cm²

If a die is rolled, what is the probability of rolling an even number?

• 1/3

• 1/4

• 2/3

• 1/2

What is the y-intercept of the line represented by the equation y = 3x + 4?

• 3

• 0

• 4

• -4

Calculate the mean of the following set of numbers: 4, 8, 6, 5, 3.

• 5.2

• 4.5

• 6.0

• 7.2

What is the distance between the points (1, 2) and (4, 6)?

• 5

• 10

• 7

• 3

If f(x) = 2x + 1, what is f(3)?

• 4

• 5

• 9

• 7

What is the sum of the interior angles of a triangle?

• 90 degrees

• 180 degrees

• 120 degrees

• 360 degrees

In a class of 30 students, 18 are girls. What is the probability of randomly selecting a boy?

• 0.6

• 0.5

• 0.4

• 0.2