Use a graphing calculator to determine which expression completes the identity.The expression 
+ 
is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?
A. tan2 x
B. 1 - cos x
C. 3 sec x
D. 2 sec2 x
Answer: D
Mathematics
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Solve the problem.One pump can drain a pool in 11 minutes. When a second pump is also used, the pool only takes 2 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in use?
A. 2
minutes
B. 
minute
C. 13 minutes
D. 1
minutes
Mathematics
Find the average rate of change for the function over the given interval.y = 5x + 7 between x = -1 and x = 0
A. 
B. 5
C. -28
D. - 
Mathematics
Perform the indicated operations.(10m + 3)2
A. 10m2 + 60m + 9 B. 100m2 + 9 C. 10m2 + 9 D. 100m2 + 60m + 9
Mathematics
Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. x = 9.6 B. x = 40.30 C. x = 40.3 D. x = 1.32
Mathematics