5. Jerry is planning to buy a stereo system priced at $840 through an installment plan. This plan requires a down payment of $190 and 24 monthly payments of $32.35. How much more will Jerry pay for the stereo system by using the installment plan rather than paying cash?
A. $63.60
B. $126.40
C. $253.60
D. $ 650.00
8. At the beginning of the summer, Katie opened a new checking account with a $60 deposit. Each week during the summer, she earned $95 as a part-time lifeguard. Katie deposited 10% of these earnings into her account. Which of these equations represents the amount of money, m, Katie will have deposited in her checking account after w weeks?
A. m = 15.5w
B. m = w + 69.5
C. m = 95w + 60
D. m = 9.5w + 60
10. Which equation is equivalent to 3(2x - 5) = 4(x + 3)?
A. 2x = -27
B. 2x = 27
C. 10x = -27
D. 10x = -3
12. Susan entered a highway at 1:00. On the highway, she had driven a total of 32 miles by 1:30, 61 miles by 2:00, and 125 miles by 3:00. Which kind of data display would be an appropriate way to show how Susan's total driving distance varied with time?
A. line graph
B. circle graph
C. stem-and-leaf plot
D. box-and-whisker plot
13. Aaron wants the mean of his 5 geometry test scores to be at least 90%. His scores on the first four tests are 85%, 83%, 96%, and 91%. What is the minimum score Aaron can earn on the fifth test to meet his goal?
A. 89%
B. 90%
C. 95%
D. 100%
15. Jeffrey wants to determine the favorite professional sport of the students in his high school. Which sample should Jeffrey use?
A. a random sample of the students in the chess club
B. a random sample of the students on the football team
C. a random sample of the students on the official school roster
D. a random sample of the students in the library during fifth period|||5) The payments total $966.40 (24 times $32.35 plus $190) which is (B) $126.40 more than the original cash price of $840
8) Ten percent of her $95 earnings would be $9.50 each week ... times m weeks plus the initial deposit of $60. The equation to figure out how much was in her account is (D) m = 9.5w + 60
10) 3(2x - 5) = 4 (x + 3)
6x - 15 = 4x + 12
2x = 27 (answer is B)
12) I would expect the answer to be (A) a line graph, to show the relationship / progression over time
13) An average is found by adding a number of values together and dividing by the number of values. We have four scores and we are told that Aaron wants the average of five scores to be at least 90% - so we want to find a number that will divide by five and come out to at least 90. (To find that, we can multiply 90 by 5 = 450) So Aaron needs a total of at least 450 points to get a final average of 90, and he has 355 (add the four scores already given in the problem). He needs to get (c) 95%
15) If Jeffrey wants to know what the students in his high school would pick as their favorite professional sport, the question is asking for a RANDOM sample. The football team, the chess club are going to be activities that students sort themselves into and would probably NOT give a totally representative random sampling. Only the school roster (C) would be complete free from bias.
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