8 th Grade Second Quarter Review: Standards: 8.15abc, 8.3ab, 8.12, and 8.13ab

8.12 You have a basket of rolls: 5 wheat 6 sourdough 8 sesame 9 cheese What is the probability that you randomly pick a sesame roll, eat it, and then a cheese roll?

8.15b Solve:

x > -5

8.13b Which of these best describes the relationship of the data shown on this scatterplot?

C. Positive relationship

8.15a Pearson rented a moving van for 1 day. The total rental charge is $ A daily rental costs $45.00 plus $0.25 per mile. How many miles did he drive the van?

84 miles

8.3a

$16.50

8.15b Solve and graph:

8.12 In the scatter plot below, what is the relationship between a child’s age and his or her shoe size?

Positive correlation

8.15c Which property justifies the work between steps 2 and 3? Step 1: 5m + 18 = 15m m Step 2:5m + 18 = 11m – 24 Step 3:5m – 11m + 18 = 11m – 11m – 24 Step 4:-6m + 18 = - 24 a) Additive Identity Property b) Addition Property of Equality c) Subtraction Property of Equality d) Combine like terms

c

8.12 A bag contains 4 green marbles and 4 striped marbles. Each marble is the same size and shape. John will randomly draw 2 marbles from the bag without replacement. What is the probability John will draw a green marble both times?

8.15a Solve: 3x + 19 = -2x + 34

x = 3

8.15a Solve: 2x + 3(4x - 3) = 8 - 3x

x = 1

8.3a

96 servings

8.15b Solve and graph:

8.3b Jessica buys lunch each day from the school cafeteria. In November, Jessica spent $35.00 on school lunches. In December, she spent $40.25 on school lunches. What is the percent increase in the amount of money Jessica spent on school lunches in November compared to the amount of money she spent in December?

15 % Increase

8.15b Solve and graph:

8.3a Amy rents a hotel for $45 per night. She rents for two nights and pays a sales tax of 13%. How much tax did she pay?

Amy spent $11.70 on sales tax.

8.3

8.15a Solve.

x = -8

8.3b Jessica buys lunch each day from the school cafeteria. In November, Jessica spent $35.00 on school lunches. In December, she spent $40.25 on school lunches. When compared to December, Jessica had a 10% increase in school lunch spending in January. How much did she spend on school lunches in January?

$44.28 total

8.15b Solve and graph:

8.3a

4.375 inches of water

8.12 A class has five girls and seven boys. If each student wants to be one of the two announcers for a variety show. Is there a better chance for two girls to be chosen or two boys to be chosen?

Two Boys

8.13b In the scatter plot below, what is the relationship between the mean annual temperature and the elevation?

Negative correlation

8.12 Each letter in the word MATH is written on a card and put into a bag. What is the probability of drawing the A, putting it aside, and then drawing the H?

8.13a Pablo surveyed his friends about their siblings. Here are his results. Which conclusion is not supported? A The same number of friends have only brothers as have no siblings. B About 50% of Pablo’s friends have only brothers or only sisters. C More friends have at least one brother than at least one sister. D About 50% of Pablo’s friends have at least one sister.

8.13a Mrs. Johnson made a histogram of the number of books read in one month by students enrolled in the summer reading program. Using this histogram of the data, which statement is not a reasonable conclusion? F 8 students read 4–9 books.G 6 students read 4–6 books. H 14 students read 4–9 books.J 2 students read 7–9 books.

H 14 students read 4–9 books.

8.3a Janet brought a digital camera for $496.20, including tax. She made a down payment of $ and paid the balance in 5 equal monthly payments. What was Janet’s monthly payment for this digital camera ?

$75.64

8.15a

x = 3

8.12 Three fair dice are rolled at the same time. What is the probability that all three dice will display 4 on the top face?

8.15b Which graph best represents the solution to 6x + 11 ≤ 20 ?

A

8.13a The graph shows the number of students in two classes who preferred each game. Based on the graph, which statement is true? B. The total number of students who preferred Chess was 10 more than the total number of students who preferred Backgammon. C. Class A had fewer students surveyed than Class B. A. The total number of students surveyed in Class A was the same as the total number of students surveyed in Class B. D. The mean number of students surveyed in Class A is 24.

A. The total number of students surveyed in Class A was the same as the total number of students surveyed in Class B.

8.3b Greg spent 25 hours watching television last week. This week, he spent 20 hours of television. What is the percent decrease in the amount of time Anthony spent watching television? Round your answer to the nearest whole number.

20% decrease

8.15a Simplify the expression. −2x x

4x + 11