Solve the problem.On August 12, the Abbott family received 31 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. 13 magazines
B. 6 magazines
C. 5 magazines
D. 8 magazines
Answer: C
Mathematics
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Write the function in standard form and find the vertex.f(x) = x2 - 14x + 2
A. f(x) = (x - 7)2 - 47; (7, -47) B. f(x) = (x - 7)2 - 145; (7, -145) C. f(x) = (x + 7)2 + 149; (-7, 149) D. f(x) = (x + 14)2 + 394; (-14, 394)
Mathematics
Solve.There are currently 57 million cars in a certain country, decreasing by 0.5% annually. How many years will it take for this country to have 39 million cars? Round to the nearest year.
A. 578 yr B. 76 yr C. 5 yr D. 36 yr
Mathematics
Evaluate the expression. Write answer without exponents.
1/2
A. 
B. 
C. 
D. 
Mathematics
Find the absolute value of the complex number.z = 2
A. 
B. 2i
C. 4
D. 2
Mathematics