7th grade SC Ready Practice (Calculator)

Last year, Ted’s salary was $42,000. He donated  $\frac{1}{25}$   of last year’s salary to charity. How much did Ted earn last year after his donation?

• $31,500

• $40,320

• $43,680

• $52,500

A grocery store charges $0.75 per donut. Which equation can be used to find c, the total cost, in dollars, to buy d donuts?

• c = 0.75 + d

• c = 0.75d

• d = 0.75 + c

• d = 0.75c

A community center is offering a discount on swimming passes. The regular cost for a swimming pass is $6.00. Jake, Liza, and Manuel each buy a swimming pass at the community center. After the discount, the total cost for the three passes is $14.40. What is the discount the community center is offering?

• 20%

• 42%

• 71%

• 80%

Which expression is equivalent to 2.5(x – 1) + 4.5(–x – 2)?

• -2x – 11.5

• -2x + 11.5

• 7x – 11.5

• 7x + 11.5

Which expression is equivalent to -6x + 7.5?

• -3(2x – 2.5)

• -3(2x + 2.5)

• -3(2x – 7.5)

• -3(2x + 7.5)

Becker and Kayla are members of the school chess team. They record the number of games they each play for 10 days. The data is shown below.

Becker: 5, 2, 4, 1, 1, 4, 5, 3, 2, 1

Kayla: 2, 3, 1, 1, 4, 1, 5, 3, 5, 5

Based on the data, which estimate represents the mean number of games chess team members play per day?

• 1

• 3

• 4

• 10

Emily and Tyson each surveyed 10 people in a community. The people were asked how many years they have lived in their current homes. The table shows the mean, median, and range for the data from each survey.

Based on the data, what conclusion can be made about the range number of years people in the community have lived in their current homes?

• It is less than 20 years.

• It is greater than 20 years.

• It is exactly 24 years.

• It cannot be determined.

Antonio randomly surveyed 20 people at a bus stop on Friday morning and on Saturday morning. He asked how old each person was. The table shows the mean, median, and mode for the data Antonio collected on Friday and Saturday.

Which conclusion could Antonio make about the ages of people that ride the bus?

• Every person that rides the bus is older than the age of 16.

• Every person that rides the bus is younger than the age of 29.

• Most people that ride the bus are older than the age of 25.

• Most people that ride the bus are younger than the age of 25.

Andrew records the color of each car that passes through an intersection. Based on his data, he determines it is neither likely nor unlikely that the next car passing through the intersection will be blue. Which value could be Andrew’s estimate?

• 0.01

• $\frac{1}{2}$

• 75%

• 1

Denise makes a scale model of a train for a science fair project. The actual train has a length of 80 feet. Denise’s scale model of the train has a length of 5 feet. The diameter of the largest wheel on the actual train is 60 inches.

Using the same scale, what is the diameter, in inches, of the largest wheel on Denise’s scale model?

• 3.75

• 5.75

• 16

• 44