Solve the problem.In a survey about the number of siblings of college students, the following probability table was constructed: 
What is the probability that a student has less than 2 siblings?
A. 0.56
B. 0.2
C. 0.76
D. 0.24
Answer: A
Mathematics
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Determine whether the statement is true or false. ? If f is a function, then f (a + b) = f (a) + f (b). ?
A. True B. False
Mathematics
The given pattern continues. Write down the nth term of the sequence {an} suggested by the pattern.2, -4, 6, -8, ...
A. an = (-1)n ? 2n B. an = (-1)n ? 2 C. an = (-1)n + 1 ? 2n D. an = (-1)n + 1 ? 2
Mathematics
Make a table to find the limit. 
A. -1 B. 1 C. 0 D. does not exist
Mathematics
Find the vertex of the parabola by completing the square.y = x2 - 3x - 9
A. (-1.5, -11.25) B. (1.5, -11.25) C. (1.5, 6.75) D. (-1.5, -9.25)
Mathematics