Use the addition rule to solve the problem.If P(A) = 0.6, P(B) = 0.5, and P(A ? B) = 0.9, then what is P(A ? B)?
A. 0.7
B. 0.1
C. 0.2
D. 1.8
Answer: C
Mathematics
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Use the four-step method in problem solving to solve the problem.CD's were purchased at $65 per dozen and sold at $40 for four CD's. Find the profit on 9 dozen CD's.
A. $25 B. $55 C. $495 D. $225
Mathematics
Write in exponential notation. Do not evaluate.(8)(8)(8)(8)(8)
A. 80 B. 5 ? 8 C. 58 D. 85
Mathematics
Find the slope and y-intercept of the line.9x + y = -10
A. slope = 9; y-intercept = -10
B. slope = - 
; y-intercept = - 
C. slope = -9; y-intercept = -10
D. slope = - 
; y-intercept = - 
Mathematics
Write a formula for the nth term of the arithmetic sequence. Use the formula to find the 20th term of the sequence.2, 6, 10, 14, 18, . . .
A. an = 2n - 4; a20 = 36 B. an = 4n - 2; a20 = 78 C. an = n + 4; a20 = 24 D. an = 4n + 2; a20 = 82
Mathematics