Perform the indicated operations. Write the resulting polynomial in standard form.(4x2 + 4x + 7) + (2x2 + 4x + 6) - (5x + 2)
A. 6x2 + 3x + 11
B. 4x2 + 3x + 15
C. 4x2 + 3x + 11
D. 6x2 + 3x + 15
Answer: A
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Combine like terms, if possible.9a - 2a + 7
A. -7a + 7 B. 7a + 7 C. 14a D. Cannot be simplified
Solve the system of equations by using elimination by addition.
A. (-4, -1) B. (4, 0) C. Inconsistent D. (-5, 0)
Solve the problem.The grade resistance F of a car traveling up or down a hill is modeled by the equation F = W sin ?, where W is the weight of the car and ? is the angle of the hill's grade (? > 0 for uphill travel, ? < 0 for downhill travel). Find the weight of the car (to the nearest pound) that is traveling on a 
downhill grade and which has a grade resistance of 
lb.
A. 4000 lb B. 4300 lb C. 4100 lb D. 3800 lb
Solve the problem.The cost of manufacturing a computer part is related to the quantity produced, x, during a production run. When 100 parts are produced, the cost is $300. When 600 parts are produced, the cost is $4800. Find an equation of the line relating quantity produced to cost. Write the final answer in the form C = mx + b.
A. C = 9x - 600 B. C = 9x C. C = 600x + 9 D. C = 9x + 600