Simplify the expression. If any variables exist, assume that they are positive.6
+ 9
A. 15
B. 54
C. 15
D. 165
Answer: A
Mathematics
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Solve the equation (x in radians and ? in degrees) for all exact solutions where appropriate. Round approximate answers in radians to four decimal places and approximate answers in degrees to the nearest tenth.tan x(tan x -5) = 6
A. {1.3923 + n?, 6 + n?} B. {1.4056 + n?, 2.3562 + n?} C. {1.3923 + n?, 2.6454 + n?} D. {1.4056 + n?, 5.4978 + n?}
Mathematics
Evaluate the expression using the order of operations.-7
A. - 7 B. -49 C. 7 D. 49
Mathematics
Find the unit vector that has the same direction as the vector v.v = 8i
A. u = 
i
B. u = 8i
C. u = 64i
D. u = i
Mathematics
For problem 5-9, solve the system of equations by substitution.
A. 
B. 
C. 
D. 
E. None of these
Mathematics