Factor the trinomial completely, or state that the trinomial is prime.48x2 + 40xy - 48y2
A. 8(3x - 2y)(2x - 3y)
B. 8(3x - 2y)(2x + 3y)
C. 8(3x + 2y)(2x - 3y)
D. 8(6x2 + 5xy - 6y2)
Answer: B
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Solve the formula for the specified variable.S = 2?rh + 2?r2 for h
A. h = 
B. h = 
- 1
C. h = S - r
D. h = 2?(S - r)
An expression that occurs in calculus is given. Factor completely.(2x + 1)2 + 3(2x + 1) - 4
A. 2x - 1 B. 2x(2x + 1) C. 2x - 6 D. 2x(2x + 5)
The graph of a function f is given. Use the graph to answer the question.Find the numbers, if any, at which f has a local minimum. What are the local minima?
A. f has a local minimum at x = -1; the local minimum is 0 B. f has a local minimum at x = -1 and 1; the local minimum is 0 C. f has a local minimum at x = 0; the local minimum is 3 D. f has no local minimum
A satellite is circling 145 miles above the earth, as shown in the figure. When the satellite is directly above point B, angle A is found to be 74.8º. Use this information to find the radius of the earth. Apply the rules regarding the use of significant digits when determining your answers.
?
?
Earth's radius = __________ mi
Fill in the blank(s) with the appropriate word(s).