Solve the problem.A number x is selected at random from the interval [18, 57]. The probability density function for x is given byf(x) = 
, for 18 ? x ? 57.
Find the probability that a number selected is in the subinterval [25, 41].
A. 
B. 
C. 33
D. 
Answer: D
Mathematics
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Divide and simplify.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Use the graph of the quadratic function to determine the sign of the leading coefficient, the vertex, and the equation of the axis of symmetry.
A. Positive; (-2, 3); x = -2 B. Positive; (2, 3); x = 2 C. Negative; (2, 3); y = 3 D. Negative; (2, 3); x = 2
Mathematics
Find the domain of the composite function f?g.f(x) = 7x + 28,g(x) = x + 1
A. (-?, -4) or (-4, -1) (-1, ?) B. (-?, 5) or (5, ?) C. (-?, -5) or (-5, ?) D. (-?, ?)
Mathematics
Rationalize the denominator and simplify.
A. 
B. 
C. 
D. 
Mathematics