Combine like terms. Write the answer in descending order.
x4+ 9x3 - 5 - 3x3 - 
x4 + 8
A. 
x3 + 6x2 + 3
B. 
x4 + 12x3 + 13
C. 
x4 + 6x3 + 3
D. 
x4 + 6x3 + 3
Answer: C
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Decompose into partial fractions.
A. 2x - 5 - 
+ 
B. 2x - 5 - 
+ 
C. 2x + 5 - 
+ 
D. 2x + 5 - 
+ 
Simplify the expression. Assume all variables represent positive real numbers.
A. 
B. 7
C. 
D. 11
Solve the problem.If a rock falls from a height of 60 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 60 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 1.58 sec B. 12.24 sec C. 3.5 sec D. 2.5 sec
Solve.A vendor has learned that, by pricing pretzels at $1.00, sales will reach 122 pretzels per day. Raising the price to $1.75 will cause the sales to fall to 92 pretzels per day. Let y be the number of pretzels the vendor sells at x dollars each. Write a linear equation that relates the number of pretzels sold per day, y, to the price x.
A. y = - 
x + 
B. y = 40x + 82
C. y = -40x - 162
D. y = -40x + 162