Solve the problem.Find the expected number of girls in a family of 7.
A. 3.5
B. 3.25
C. 4
D. 3
Answer: A
Mathematics
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Multiply the binomials.(x - 8y)(-3x - 8y)
A. -3x2 + 16xy + 16y2 B. -3x2 + 16xy + 64y2 C. x2 + 16xy + 64y2 D. x2 + 16xy + 16y2
Mathematics
Multiply.-7x2(-6x7 - 12x3)
A. 126x2 B. 42x9 - 12x3 C. 126x9 + 126x5 D. 42x9 + 84x5
Mathematics
Find the equilibrium vector for the transition matrix.
Round the numbers in your answer to the nearest thousandth.
A. 
B. 
C. 
D. 
Mathematics
Find the sum.Find the sum of the first 30 terms of the arithmetic sequence: 13, 8, 3, -2, . . .
A. -1785 B. -137 C. -1777 D. -1860
Mathematics