Math 8 - Q1 Review

What is the sum of 3x+5x?

• 8x

• 2x

• 15x

• 15x

Simplify: 7a−4a

• 11a

• 3a

• −3a

• a

What is the result of 5m+(−2m)?

• 3m

• 7m

• −3m

• 10m

• 2x

• 9x

• x2

• 3x

• 3

• 3y

• 8y

• y

• 2a

• 2a3

• 5a

• 15a

The scores of five students are: 12, 15, 10, 13, 20. Compute the mean, median, and mode of the data.

• Mean = 14, Median = 13, Mode = none

• Mean = 14, Median = 13, Mode = 12

• Mean = 13, Median = 14, Mode = none

• Mean = 13, Median = 13, Mode = none

The scores of 6 students are: 10, 12, 14, 16, 18, 20. Using these data, which of the following statements are correct? I. The mean is 15. II. The median is 15. III. The mean and median are equal

• I and II only

• II and III only

• I and III only

• I, II, and III

The heights (in cm) of 8 plants are: 4, 6, 6, 8, 10, 12, 12, 14. Calculate the mean and identify how many modes are present in the data.

• Mean = 9, One mode

• Mean = 9, Two modes

• Mean = 8, One mode

• Mean = 8, Two modes

The data set is: 25, 30, 35, 25, 40, 45, 30. Determine the mode and the mean.

• Mode = 25 and 30, Mean = 32.1

• Mode = 25, Mean = 32.1

• Mode = 30, Mean = 33.5

• Mode = 25 and 30, Mean = 33.5