Solve.The sum of the ages of Art, Ben, and Cal is 59. Art is 1 year older than Cal, and Cal is 1 year younger than Ben. Which of these people were teenagers 7 years ago?
A. Art
B. Art, Ben, and Cal
C. Art and Ben
D. Ben
Answer: C
Mathematics
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List the four steps in the problem-solving process first introduced by George Polya and employed in all the problem-solving strategies.
Write your answers concisely and completely. Feel free to use figures and/or tables to illustrate the points you are making.
Mathematics
Perform the indicated operation. Write the sum as a fraction, whole number, or mixed number in lowest terms.
+ 
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression using the order of operations.[6 + (-2)]2
A. 16 B. 64 C. 32 D. 40
Mathematics
Express the sum using summation notation.
+ 
+ 
+ ... + 
A. 
B. 
C. 
D. 
Mathematics