(Systems of Linear Equations MC)Which point is a solution to the system of linear equations?y = −x + 6x − 3y = 18?

(Slope MC)Superior Segway Tours gives sightseeing tours around Chicago, Illinois. It charges a one-time fee of $40, plus $35 per hour. What is the slope of this situation?

(08.02 MC) Arlene is testing whether school is more enjoyable when students are making high grades. She asked 100 students if they enjoyed school and whether their GPA was above or below 3.0. She found that 30 of the 40 students with a GPA above 3.0 reported that they enjoyed school, and 15 of the 60 students with a GPA below 3.0 reported that they enjoyed school. What is the probability that a student with a GPA below 3.0 does not enjoy school?

(Similar Triangles MC)A small tree that is 8 feet tall casts a 4-foot shadow, while a building that is 24 feet tall casts a shadow in the same direction. Determine the length of the building’s shadow.

(Graphing Linear Equations MC)A restaurant at the food court in a mall is offering a lunch special. The table shows the relationship between the number of side dishes and the total cost of the special. Restaurant Number of Side Dishes Total Cost 2 $10.25 4 $13.25 5 $14.75 8 $19.25 Which of the following graphs shows the relationship given in the table?

(08.03 LC) Mama’s Italian Restaurant has collected data about customer sauce orders. It calculated that P(marinara) = 0.82, P(alfredo) = 0.76, and P(marinara or alfredo) = 0.96. Determine the P(marinara and alfredo).

(Translations MC)Triangle PQR has vertex coordinates at P(4, 0), Q(6, 4), R(5, 1). If the triangle is translated so that Q′(9, 4), determine the translation direction and number of units.

(Rotations MC)Triangle UVW has vertices at U(−2, 0), V(−3, 1), W(−3, 3). Determine the vertices of image U′V′W′ if the preimage is rotated 180° counterclockwise.

(08.03 LC) Lazar drives to work every day and passes two independently operated traffic lights. The probability that both lights are green is 0.41. The probability that the first light is green is 0.59. What is the probability that the second light is green, given that the first light is green?

(08.05 MC) Alma wants to prove to her parents that listening to music while she studies for her tests will help her get better grades. She decides to ask 15 of her friends if they listen to music while they study for tests and what their grades are. She finds that her friends who have high grades also listen to music while they study for tests. She tells her parents that she has proven that listening to music while studying for tests will cause her grades to improve. What mistake has Alma made?