Find the axis of symmetry of the given function.f(x) = x2 - 8x + 18
A. x = -4
B. x = 2
C. x = 4
D. x = 0
Answer: C
Mathematics
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Solve the problem.The amount of Jen's monthly phone bill is normally distributed with a mean of $69 and a standard deviation of $9. What percentage of her phone bills are between $69 and $78?
A. 68% B. 95% C. 47.5% D. 34%
Mathematics
Evaluate the expression.
A. 100 B. 5 C. 20 D. 10
Mathematics
Solve.x - 5 = 
A. 10, 2 B. No solution C. 5 D. 10
Mathematics
Write the phrase as a variable expression. Use x to represent "a number."9 decreased by 4 times a number
A. 9 - 4x B. 4x - 9 C. 4 - 9x D. 9x - 4
Mathematics