Solve the problem.On August 22, the Fernandez family received 35 pieces of mail, consisting of magazines, bills, letters, and ads. If they received the same number of magazines as letters, three more bills than letters, and five more ads than bills, how many magazines did they receive?
A. 9 magazines
B. 14 magazines
C. 7 magazines
D. 6 magazines
Answer: D
Mathematics
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Solve the problem.Suppose that the data set {x1, x2, x3, ..., xN} has median M and interquartile range IQR. If M' and IQR' are the median and interquartile range of the data set 
respectively, then
A. M' = M + c, and IQR' = IQR + c. B. M' = M, and IQR' = IQR. C. M' = M, and IQR' = IQR + c. D. M' = M + c, and IQR' = IQR. E. none of these
Mathematics
Find the exact value of the expression. Do not use a calculator.1 + cot2 30° - sec2 45°
A. 1 B. 2 C. 3 D. 0
Mathematics
Solve the equation.
- 
= 
A. ? B. {7} C. {-1} D. {1}
Mathematics
Give the equations of any asymptotes of the type specified for the graph of the rational function.f(x) = 
; horizontal
A. y = -1 B. y = 3 C. y = 7 D. None
Mathematics