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Unformatted text preview: MAC 1105 Module Test 3 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Give the coordinates of the point of intersection of the linear equations. 1) 4x + y = 9 2x + 4y = 22 A) (5, 1) B) (1, 5) C) (0, 5) D) (1, 0) Does the system have a unique solution, no solution, or many solutions? 2) 2x + 3y = 6 4x + 6y = 12 A) A unique solution B) Many solutions C) No solution Solve the problem. 3) Suppose that the number of inhabitants of Country A is given by y = - 7.73x + 923.95 million, and the number of inhabitants of Country B is given by y = 3.67x + 617.29 million, where x is the number of years since 1960. When the number of inhabitants of Country A equals the number of inhabitants of Country B, how many people inhabit each country? A) 716,786,000 people B) 715,240,000 people C) 716,013,000 people D) 717,559,000 people To Fnd the number of units that gives break- even for the product, solve the equation R = C. Round your answer to the nearest whole unit. 4) A manufacturer has total revenue given by the function R = 90x and has total cost given by C = 45x + 65,000, where x is the number of units produced and sold. A) 45 units B) 1444 units C) 481 units D) 135 units Solve the system of equations by substitution, if a solution exists....
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