Factor the polynomial.x2 + 4x - 21
A. (x - 7)(x + 3)
B. (x - 7)(x + 1)
C. (x + 7)(x - 3)
D. prime
Answer: C
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Fill in the blank with one of the words or phrases listed below. 
A(n) 
is made up of two rays that share the same endpoint. The common end point is called the 
.
A. adjacent; vertex B. adjacent; vertical C. angle; vertex D. angle; vertical
Write the appropriate symbol, either < or >, between the two whole numbers.198 ___ 13
A. > B. <
List all the factors of the number.56
A. 1, 2, 4, 7, 8, 14, 28, 56 B. 1, 2, 4, 7, 8, 14, 18, 28, 56 C. 2, 4, 7, 8, 14, 28 D. 1, 2, 3, 4, 7, 8, 14, 18, 28, 56
Write the first five terms of the arithmetic sequence.an = an - 1 + 5.7; a1 = 11
A. 5.7, 16.7, 27.7, 38.7, 49.7 B. 11, 5.7, 16.7, 22.4, 28.1 C. 10, 15.7, 21.4, 27.1, 32.8 D. 11, 16.7, 22.4, 28.1, 33.8