Solve the system of equations by the substitution method.
A. (-3, 10)
B. (2, 10)
C. (-2, 9)
D. no solution
Answer: C
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Simplify the expression by rationalizing the denominator.
A. - 
B. 
C. 
D. - 
Match the function f with its graph.f(x) = log2(x - 2)
A. 
B. 
C. 
D. 
Solve the problem.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. Find the equation of the least-squares regression line that models the data. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. y ? 1.86 + 88.6x B. y ? 0.930 + 44.3x C. y ? 44.3 + 0.930x D. y ? 88.6 - 1.86x
Lymnozyme cures most infections in Koi fish caused by bacteria; in fact, it has been shown to be 98% effective if used according to the directions. If 11 Koi with a bacterial infection are treated, what is the probability that 10 of the fish are cured? ?
A. 0.1788 B. 0.1798 C. 0.1973 D. 0.9481 E. 0.1767