Decide whether the situation involves permutations or combinations.An arrangement of 7 people for a picture.
A. Permutation
B. Combination
Answer: A
Mathematics
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Several computer stores reported differing prices for toner cartridges for a laser printer (in dollars): 55, 56, 76, 74, 79, 58, 59, 54, 74. Find the mean price of a toner cartridge.
A. $66.00 B. $65.00 C. $65.20 D. $64.80 E. $64.90
Mathematics
Simplify the expression.
A. 
B. 
C. 
D. 
Mathematics
Suppose that y is directly proportional to x. Use the given information to find the constant of proportionality k. Then use y = kx to find y for the given value of x.y = 25.9 when x = 7;
Find y given x = 13.
A. k = 3.9; y = 48.1
B. k = 181.3; y = 
C. k = 3.7; y = 48.1
D. k = 3.7; y = 50.7
Mathematics
Evaluate.cos2 315° - sin2 270° + 4 tan2 30°
A. - 
B. 
C. 
D. 
Mathematics