Factor completely.5x3 + 10x2 - 40x
A. 5x(x - 2)(x + 4)
B. (x - 2)(5x2 + 20)
C. 5x(x + 2)(x - 4)
D. (5x2 + 10x)(x - 4)
Answer: A
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As part of a study, 800 college football players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 235 pounds and the standard deviation is 25 pounds.Of the 800 players approximately how many weighed 210 pounds or less?
A. 128 B. 200 C. 64 D. 544 E. none of these
Classify the following as either a pair of equivalent equations or a pair of equivalent expressions.6x - 8 = 7, 6x = 15
A. Equivalent equations B. Equivalent expressions
Write the quotient in the form a + bi.
A. 
- 
i
B. 
+ 
i
C. 1 + 1i
D. 
+ 1i
Use the graph of the function to estimate the x-intercepts.f(x) = -x2 + 4x + 5
A. x = -5, x = 1 B. x = 4, x = 5 C. x = -1, x = 5 D. x = -5, x = -1