Math 7 practice

A group of students plans to participate in a swimming competition. The students begin training with a coach one month prior to the competition. The dot plots shown represent the time they took to finish a 50-meter (m) lap before the start of training and after training was completed.

Choose the correct answer to fill in the blanks- A ____ overlap between the distributions indicates that after one month of training, there is ___________ in the time taken by the students to complete a lap.

• small, a significant increase

• large, a significant increase

• small, a significant decrease

• large, a significant decrease

What is the product of -1 and -8?

Two students are randomly selected from a group of three students: Kim, Pat, and Sue.

Which set represents the sample space for selecting these two students?

• {Kim, Pat, Sue}

• {Kim and Pat, Pat and Sue}

• {Kim and Pat, Kim and Sue, Pat and Sue}

• {Kim and Pat, Kim and Sue, Pat and Sue, Sue and Kim}

Paige fills a large bucket with water. She fills it with 3/8 gallon of water in 1/4 minute.

What is Paige's unit rate for filling the bucket, in gallons per minute (gpm)?

A right pentagonal pyramid is shown.

Select all of the two-dimensional shapes that can result from slicing the right pentagonal pyramid with a plan parallel or perpendicular to its base.

• Triangle

• Rectangle

• Pentagon

• Trapezoid

• Parallelogram

A 6-sided number cube with sides labeled 1, 2, 3, 4, 5, and 6 is rolled 50 times.

What is a good prediction for the number of times a 5 will be rolled? *Round to the nearest whole number.

The graph of a proportional relationship is shown.

What is the constand of proportionality of the relationship?

A bag containes blue, red, green, and yellow wrapped candy. All of the candy is the same size and shape. There is an equal number of each color of candy in the bag.

A piece of candy will be randomly selected from the bag.

What is the probability of selecting a red or yellow candy?

• 0

• 0.5

• 1

• 2

A bag containes blue, red, green, and yellow wrapped candy. All of the candy is the same size and shape. There is an equal number of each color of candy in the bag.

A piece of candy will be randomly selected from the bag.

What is the probability of selecting a blue, red, green, or yellow candy?

• 0

• 0.5

• 1

• 2

A bag containes blue, red, green, and yellow wrapped candy. All of the candy is the same size and shape. There is an equal number of each color of candy in the bag.

A piece of candy will be randomly selected from the bag.

What is the probability of selecting a purple candy?

• 0

• 0.5

• 1

• 2