Sample Midterm 1 WI 06

# 7 points form a page 4 of 8 4 algebraically solve the

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(7 points)

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Form A Page 4 of 8 4. Algebraically solve the system of equations. (Calculator solutions will receive NO CREDIT.) y + 4 = 2 x x 2 + y = 31 (12 points)
Form A Page 5 of 8 5. Multiple Choice. Circle your answer. (12 points) (a) In which viewing window can you see a complete graph of the polynomial y = 0 . 1( x + 3)( x - 2)( x - 14)? i. Xmin = - 10 ii. Xmin = - 5 iii. Xmin = - 5 iv. Xmin = - 15 Xmax = 10 Xmax = 15 Xmax = 15 Xmax = 5 Ymin = - 10 Ymin = - 10 Ymin = - 50 Ymin = - 50 Ymax = 10 Ymax = 10 Ymax = 10 Ymax = 10 (b) Is the ordered pair (4 , 7) a point on the graph of the equation y = 4 x + 9? Yes No (c) The profit, P, of selling x -muffins per week at the Muffin Man Bakery is given by P = - 0 . 02 x 2 + 16 x - 1500 . How many muffins must the bakery sell per week to maximize profit? i. 1700 ii. 1600 iii. 400 iv. 800 (d) Which of the following could be the leading term of the polynomial whose graph is given below? i. - 2 x 7 ii. 2 x 7 iii. - 3 x 8 iv. 3 x 8

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Form A Page 6 of 8 6. Find all solutions to x 4 + 3 x 2 = 4 x 3 + 1 . (Round your answer to 2 decimal places.) (12 points)
Form A Page 7 of 8 7. Jennifer received a bonus of \$2,000 from her employer. She invested part of this money in an enterprise that earned interest at the rate of 6% per year. The rest was invested in a more risky enterprise that paid interest at the rate of 11% per year.

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