Factor the square of the binomial.x2 + 18xy + 81y2
A. (x - 9y)2
B. (x + 9y)2
C. (x + 9y)(x - 9y)
D. (x + 18y)(x - 18y)
Answer: B
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Round the numbers so that there is only one non-zero digit, and estimate the answer. Then perform the indicated operation to find the exact answer.91.5 - 9.25
A. estimate: 91; exact: 92.38 B. estimate: 81; exact: 82.25 C. estimate: 91; exact: 91.28 D. estimate: 81; exact: 82.35
Solve the problem.Volatility refers to:
A. the amount of uncertainty or risk about changes in a security's value B. the likelihood that a security's value will only decrease in value C. a security's value as compared to an industry benchmark D. the likelihood that a security's value will only increase in value
Solve the system of equations using substitution.
A. x = -5, y = 0; x = 3, y = 4
or (-5, 0), (3, 4)
B. x = 0, y = 
; x = 0, y = - 
; x = 4, y = 
or 
, 
, 
C. x = 0, y = 
; x = 4, y = 
or 
, 
D. x = 5, y = 0; x = -5, y = 0; x = 3, y = 4
or (5, 0), (-5, 0), (3, 4)
Find the probability.A coach will choose 2 basketball players from a pool of 11 players to join his team. If the players are chosen at random, what is the probability that the 2 tallest players are chosen? Assume that all players are a different height.
A.
B. 
C. 
D. 