Convert the units using unit fractions.480 sec = 
min
A. 20
B. 4
C. 8
D. 15
Answer: C
Mathematics
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Write the trigonometric expression as an algebraic expression containing u and v.cos(tan-1 u + tan-1 v)
A. 
B. 
C. 
D. 
Mathematics
Decide whether or not the ordered pair is a solution of the system.(-1, -6)x + y = -7x - y = 5
A. No B. Yes
Mathematics
Simplify the expression by using the order of operations.6 - 3 + 2 ? 7 - 5 ? 
÷ 
A. 6 B. 12 C. 8 D. 7
Mathematics
Solve the variation problem.If the voltage V in an electric circuit is held constant, the current I is inversely proportional to the resistance R. If the current is 350 milliamperes when the resistance is 3 ohms, what is the current when the resistance is 21 ohms?
A. 50 milliamperes B. 2450 milliamperes C. 150 milliamperes D. 2443 milliamperes
Mathematics