Find the y-intercept of the graph of the equation y = 3x + 18.
?
A. (0, 3)
B. (18, 0)
C. (-6, 0)
D. (0, 18)
E. (0, -6)
Answer: D
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Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = -2x2 + 3x + 6
A. Increasing on 
; decreasing on 
B. Increasing on 
; decreasing on 
C. Increasing on (-?, 0); decreasing on ( 0, ?)
D. Increasing on (-?, 1); decreasing on ( -1, ?)
Find the expected value of the random variable.The random variable X is the number of people who have a college degree in a randomly selected group of four adults from a particular town. Its probability distribution is given in the table.
A. 1.20 B. 1.44 C. 2.00 D. 1.10
Multiply. 
A. 2,011,000 B. 2,001,000 C. 2,000,000 D. 2,002,000
Solve.The sum of the areas of two square plots of land is 2122 m2 and the difference of their areas is 1240 m2. Find a length of a side of each plot.
A. 5.25 m, 41 m B. 22 m, 62 m C. 40 m ,20 m D. 41 m, 21 m