Simplify.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Write the sum without sigma notation and evaluate it.
A. 
+ 
+ 
= 24
B. 
+ 
+ 
= 14
C. 
? 
? 
= 84
D. 
+ 
= 10
Mathematics
Find the exact value of the expression in degrees without using a calculator or table.cot-1 
A. 330° B. 120° C. 240° D. 60°
Mathematics
Solve the problem.Within a group of n people, the number of possible handshakes, N, is given by N = 
(n2 - n). At a party, everybody shakes hands with every other person. If the total number of handshakes is 253, how many people are at the party?
A. 22 B. 23 C. 25 D. 24
Mathematics
Evaluate the exponential expression.-120
A. 20 B. -1 C. -20 D. 1
Mathematics