Find the probability.A sample of 4 different calculators is randomly selected from a group containing 14 that are defective and 26 that have no defects. What is the probability that at least one of the calculators is defective?
A. 0.140
B. 0.164
C. 0.836
D. 0.821
Answer: C
Mathematics
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Solve and graph.-6(3y - 6) < -24y - 6
A. (-7, ?)
B. (-?, -7)
C. (-?, -5]
D. (-?, -7]
Mathematics
Solve the problem.The area A of a triangle is 10x2 + 7x - 12. If the height of the triangle is 2x + 3, find the length of its base.
A. 2(5x + 4)
B. 2(5x - 4)
C. 5x - 4
D. 
Mathematics
Graph the pair of parametric equations in the rectangular coordinate system.x = t + 6, y = 
; -5 ? t ? 5
A. 
B. 
C. 
D.
| ? |
Mathematics
Solve the equation.x2 + 20x + 100 = 0
A. 10 B. -11, -9 C. 0, 10 D. -10
Mathematics