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Math 097 Name___________________________________(print) FINAL EXAM Form C Winter 2016 Instructor:_____________________ Score: _______ The maximum possible score for this exam is 102 points. The point values for each problem are shown at the right in parenthesis. Show your work to receive full credit. If you show no work there is no partial credit. 1. Simplify:
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(6 −2)2 − 81 ÷ 3 1. __________________ (3) 2. Simplify:
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3(x −5) −4x + 20 2. __________________ (3) 3. Multiply and combine like terms:
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(5x −4)(3x + 2) 3. __________________ (3)
4. Divide:
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5x5 −10x4
10x2 4. __________________ (3)
5. Simplify: write the result using positive exponents
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(a−4)−3(a2)0
(a3)2 5. __________________ (3)
6. Simplify: write the result using positive exponents
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36x3y 4
12xy7 6. __________________ (3)
7. Factor:
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x2 −81 7. __________________ (3)
8. Solve for x:
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4x −7 = 21 8. x =________________ (3)
Form C 2
9. Solve for x:
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−2(3x −5) = −4x + 2 9. x =_______________ (3) 10. Evaluate
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x2 −3xy if
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x = −2 and
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y = 5. 10. __________________ (3)
11. Solve for x:
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x2 −8x +15 = 0 11. x =________________ (3) 12. Solve for a:
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a2 + 36 = 12a 12. a =_______________ (3) 13. Eleven out of fifty people favored and added gasoline tax. 13. __________________ (3) What percent favored the tax? 14. Frank bought a car at 7% off the regular price P.
Write an expression for the amount he paid for the car. 14. __________________ (3) 15. Express 0.00314 in scientific notation 15. _________________ (3)
16. Write
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2.93 ×104 in expanded form. 16. _________________ (3)
Form C 3
17. Factor completely. 17. _________________ (3)
18. Simplify: 18. _________________ (3) 19. Is
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(3, −5) a solution to
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7 − xy = 22? (SHOW WORK) 19. __________________ (3) 20. Solve
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P = 2L + 2W for L. 20. L =_______________ (3) 21. Write an algebraic equation for this statement. DO NOT SOLVE. “Four times the sum of a number and six is negative 30.” 21. ___________________________________________ (3)
22. a) Plot the point
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(−3, −2). (1) b) In what QUADRANT is the point
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(−3, −2) located? __________ (1) c) The slope of the line through the point
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(−3, −2)
is
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m =53. Plot a second point and sketch the
line. (3)
−4 −3 −2 −1 1 2 3 4
−4
−3
−2
−1
1
2
3
4
x
y
Form C 4
23. Consider the equation
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3x − y = 6.
a) Find the x – intercept. 23 a) (_______ , ______) (2)
b) Find the y– intercept. 23 b) (_______ , ______) (2)
c) Complete the table of values.
23 c) x y
- 4
(2)
9
(2)
24. Find the slope of the line between the points
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(−2, 4) and (3, −6) .
24. m = ______________ (3)
25. Two cars leave an intersection at the same time. In ten minutes, one car travels north 5
miles and the other drives west 12 miles. How far apart are they after ten minutes? (Hint: Use the Pythagorean Theorem: )
25. _________ _______ (4) (number) (units)
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a2 + b2 = c2
Form C 5
26. Joan has a rectangular garden that has a length of 35 feet and a width of 20 feet.
a) She wants to put a fence around the garden. The fencing costs $1.50 per foot. How much will it cost to fence the garden?
26. a) _________ _______ (4) (number) (units)
b) A bag of fertilizer covers 100 square feet of area. How many bags of fertilizer will Joan need to cover the garden?
26. b) ________________ (3) 27. The equation of line A is
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−x + 2y = 2 and the equation for line B is
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y = − 14 x + 4.
a) Graph both lines A and B on the grid below and clearly label them.
(4)
b) Use the graphs in part a) to solve the system −x + 2y = 2y = − 1
4 x + 4
27. b)
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______, ______( ) (2)
Form C 6
28. A new car loses value as soon as it is bought. Ricardo bought a new Jaguar F-Type and it depreciates according to the graph below.
a) How much did Ricardo originally pay for the car? a) _____________ (1) b) Find the slope of the line. b) _____________ (2) c) What are the units for the slope? c)______________ (1) d) Write a sentence to interpret the value and the units of the slope in the context of
this problem. Be sure to include the number and the units of the slope in your interpretation.
_________________________________________________________________ _________________________________________________________________
_________________________________________________________________ (2)