Solve the problem.Paul has grades of 75 and 65 on his first two tests. What must he score on his third test in order to have an average of at least 80?
A. at most 80
B. at least 70
C. at least 100
D. at most 73
Answer: C
Mathematics
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Perform the indicated operation(s). Where possible, reduce the answer to lowest terms.
+ 
A. 
B. 
C. 
D. 
Mathematics
Solve using the multiplication principle.
= 20
A. -140 B. -160 C. -152 D. -28
Mathematics
Find the exact value of the following expression without using a calculator.sec 240°
A. - 
B. 
C. -2
D. 2
Mathematics
Rationalize the denominator.
A. 
B. 
C. 
D. 
Mathematics