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 276, how many people are at the party?
A. 24
B. 26
C. 25
D. 23
Answer: A
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Find the exact value of the following expression without using a calculator.tan 30°
A. 
B. 
C. 1
D. 
Add.- 
+ 
A. 
B. 
C. 
D. 
Solve the problem.An airplane is sighted at the same time by two ground observers who are 4 miles apart and both directly west of the airplane. They report the angles of elevation as 11° and 
How high is the airplane?
A. 1.58 mi B. 0.76 mi C. 1.43 mi D. 2.96 mi
Solve.When Maria finished medical school she had a student loan. She repaid $12,000 of the loan within two years of graduating. That was 
of the total amount she owed. Write and solve an equation to determine the total amount, x, of the student loan.
A. 12,000 ? 
= x; $10,800
B. 12,000 ? 
= x; $24,000
C. 12,000 = 
x; $10,800
D. 12,000 = 
x; $24,000