1 (1 point) Solve the problem. A repair company's charge for repairing a certain type of copy machine fits the model where y is the number of dollars charged and x is the number of minutes the repair person is on the job. How many minutes would it take for the cost of repair to reach $110? (Round to the nearest minute.) Question 1 options: a) 255 min b) 171 min c) 10 min d) 101 min Save Question 2 (1 point) Solve the problem. DG's Plumbing and Heating charges $50 plus $70 per hour for emergency service. Bill remembers being billed just over$450 for an emergency call. How long to the nearest hour was the plumber at Bill's house? Question 2 options: a) 6 hours b) 7 hours c) 12 hours d) 16 hours Save Question 3 (1 point) Solve the problem. A chemist has two solutions that contain different concentrations of a certain acid. One is a 4% concentration and the other is an 11% concentration. How many cubic centimeters of each should the chemist mix to obtain 50 cm3 of a solution with an acid concentration of ? Question 3 options: a) 25 cc of the 4% solution and 25 cc of the 11% solution b) No solution c) 21 cc of the 4% solution and 29 cc of the 11% solution d) 29 cc of the 4% solution and 21 cc of the 11% solution Save Question 4 (1 point) Without graphing, determine whether the following data set is exactly linear, approximately linear or nonlinear. Question 4 options: a) exactly linear b) nonlinear c) approximately linear Save Question 5 (1 point) Solve the problem. A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. The linear model for this data is where x is the number of hours spent in the lab and y is grade on the test. Use this model to predict the grade of a student who spends 8 hours in the lab. Number of hours spent in lab Grade (percent) Question 5 options: a) 75.3 b) 73.7 c) 80.6 d) 69.7 Save Question 6 (1 point) Solve the system of equations, if a solution exists. Identify the x-value of that solution. Question 6 options: a) x = -7 b) x = 6 c) x = -6 d) No solution Save Question 7 (1 point) Solve the double inequality. -8.5 -4.5 Question 7 options: a) 3 < x 7 b) 3 < x < 7 c) 3 x 7 d) 3 x < 7 Save Question 8 (1 point) Solve the equation. x- x=3 Question 8 options: a) -90 b) 45 c) -45 d) 90 Save Question 9 (1 point) Solve the inequality and draw a number line graph of the solution. 0.2x > 3 Question 9 options: x < 15 a) x 15 b) x > 15 c) x 15 d) Save Question 10 (1 point) Solve the formula for the specified variable. A= bh for h Question 10 options: a) h= b) c) d) h= h= h= Save Question 11 (1 point) The graph of a certain function y = f(x) and the zero of that function is given. Using this graph, find a) the x-intercept of the graph of y = f(x) and b) the solution to the equation f(x) = 0. Question 11 options: a) a. -6 b. x = -6 b) a. -5 b. x = 0 c) a. 0 b. x = -5 d) a. -5 b. x = -5 Save Question 12 (1 point) Find the linear function that is the best fit for the given data. Round decimal values to the nearest hundredth, if necessary. The ages and lengths of several animals of the same species are recorded in the following table: Find the linear function to model this data. Question 12 options: a) y = 9x - 3 b) y = 9.8x - 2.6 c) y = 9.2x - 2.1 d) y = 10x - 3