Use a special product formula to simplify.(5a - 7c)(7c + 5a)
A. 5a2 - 7c2
B. 25a2 - 49c2
C. 25a2 - 70ac - 49c2
D. 25a2 + 70ac - 49c2
Answer: B
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Solve the linear inequality. Graph the solution set on a number line, and express the solution using interval notation.
x ? 1 + 
x
A. [-4, ?)
B. (-?, 4]
C. (4, ?)
D. [4, ?)
Solve the problem using Snell's Law: 
= 
.The index of refraction of light passing from air into a second medium is 1.40. If the angle of incidence is 
what is the angle of refraction (to two decimal places)?
A. 42.48° B. 45.13° C. 44.87° D. 47.52°
Find an expression for the nth term of the arithmetic sequence.2, -1, -4, -7, -10, . . .
A. an = -8 - 3n B. an = -3n - 5 C. an = 3n - 5 D. an = -3n + 5
Multiply. Then simplify if possible. Assume that all variables represent positive values.
A. 16w
B. 2w
C. 16w
D. 2w