7 Quarterly Review

Expressions

100

Simplify the following expression:

(4x-7)+(3x+9)

7x+2

200

Simplify the following expression: 

1/2 ( x + 6) 

1/2x + 3

300

Simplify the following expression: 

(3x-4) - (2x -9) 

x-13

400

Simplify the following expression: 

(3x - 10) + (3x + 12) 

6x + 2

500

What expressions represent getting 30% more of an item? 

A. 0.7x

B. x + 0.3x 

C. x + 0.7x 

D. 1.3x 

E. x(1+0.3)

B, D, and E 

Equations

100

What is the constant in the equation below? 

3x - 5 = 10 

-5

200

Solve the equation: 

2x - 10 = 16

x = 13

300

Solve the equation: 

-4 (x - 3) = 20 

x = -2

400

Solve the equation:

2/3x + 7 = 19

x = 18

500

Ethan bought 4 stickers and $1.75 keychain. If he spent a total of $9.75, how much did each sticker cost? 

Write an equation that represents the scenario. 

4x + 1.75 = 9.75

Inequalities

100

What is the inequality symbol below? 

> 

greater than 

200

What do you need to do with an inequality symbol when you multiply or divide a negative? 

Flip the inequality symbol 

300

Solve the inequality below: 

3x + 2 < 14 

x < 4

400

Solve the inequality below: 

-3x + 7 ≤ 10 

x ≥ -1 

500

You open a bank account and deposit 1,000 dollars. It is the end of the month and you need to withdraw $15 a week for the next 5 weeks. You don’t want your account to fall below $50. 

Will your bank account survive at the end of the month? 

Yes it will survive 

Populations and Samples

100

Define population or give an example. 

complete set of items studied

200

Define a sample or give an example

a part of a population 

300

There are 300 students in 7th grade. Paul takes a random sample to find out which school subject the students in 7th grade prefer.  

Which group of students represents the most representative sample of students? 

A. 10 of Paul’s closest friends 

B. 10 randomly selected students from each grade 

C. 10 randomly selected students from each 7th grade homeroom 

D. 10 randomly selected students on the 7th grade basketball team 

C. 10 randomly selected students from each 7th grade homeroom 

400

How do you determine a graph that has more variability? 

How wide the data is spread on the dot plot

500

Miss Zerbe and Miss O’Connor each interviewed 100 of their students on Tuesday about their favorite foods. The results are below. 

Sample #1 - 12 hamburgers - 14 Tacos - 74 Pizza 

Sample #2 - 12 hamburgers - 11 Tacos - 77 Pizza 

Based on the data, how many students could we infer prefer Tacos if there are 800 students at Bates?

About 100 students