Find the domain of the expression. x 2 - 15x + 56
A) x = 7 or x = 8
B) all real numbers except x = 0
C) x > 0
D) all real numbers
E) all real numbers except x = 7 and x = 8
D) all real numbers
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A. 40x B. 14x2 C. 14x D. 28x
Factor completely.y2 - 25
A. (y + 5)(y - 5) B. (y - 5)(y - 5) C. (y + 25)(y - 25) D. (y2 + 5)(y2 - 5)
Solve the problem.At age 50, Ann must choose between taking $18,000 at age 60 if she is alive then, or $31,000 at age 70 if she is alive then. The probability for a person aged 50 living to be 60 and 70 is 0.85 and 0.55, respectively. Using expected value, what is Ann's best option?
A. $31,000 at age 70 B. $18,000 at age 60
Solve the problem.A 5-card hand is dealt from a deck of 52 cards. What is the probability thata) none are queens?b) all are queens?
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