College Algebra

Express the interval in set-builder notation and graph the interval on a number line. [2,5] 2 Use graphs to find the set. ( - 4,1) n [0,8] 3 Use graphs to find the set. (-5,7) U [0,9] Other than a no solution set, use interval notation to express the solution set and then graph the solution set on a number line. 2x + 4 > 10 Other than a no solution set, use interval notation to express the solution set and then graph the solution set on a number line. - 6x 2 30 A truck can be rented from Company A for $140 a day plus $0.20 per mile. Company B charges $80 a day plus $0.60 per mile to rent the same truck. How many miles must be driven in a day to make the rental cost for Company A a better deal than Company B's? On two examinations, you have grades of 83 and 92. There is an optional final examination, which counts as one grade. You decide to take the final in order to get a course grade of A, meaning a final average of at least 90. a. What must you get on the final to earn an A in the course? b. By taking the final, if you do poorly, you might risk the B that you have in the course based on the first two exam grades. If your final average is less than 80, you will lose your B in the course. Describe the grades on the final that will cause this to happen. Determine whether the relation is a function. Give the domain and the range for the relation. {(1,4),(5,5).(6,6)} Determine whether the relation is a function. Give the domain and the range of the relation. {(1,3),(1,6).(2,3).(2,6)} Determine whether the relation is a function. Give the domain and range for the relation. {(7, 9). (7, 10), (7, 11)} Evaluate the function f(x) = x + 7x - 6 at the given values of the independent variable and simplify. a. f( - 9) b. f(x +2) c. f(-x) 12 Evaluate the function at the given values of the independent variable and simplify. 5x2 f (x) = -1 (a) f(4) (b) f(-4) (c) f(-x)