Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Answer: B
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Evaluate the integral.
A. 
B. 
C. 
D. - 
Determine if the equation is an identity.
= 
A. Identity B. Not an identity
Solve the problem by writing and solving a suitable system of equations.Barges from ports X and Y went to cities A and B. X sent 30 barges and Y sent 8. City A needs 20 barges and B needs 18. Shipping costs $220 from X to A, $300 from X to B, $400 from Y to A, and $180 from Y to B. $8840 was spent. How many barges went where?
A. 15 from X to A 15 from X to B 6 from Y to A 2 from Y to B B. 18 from X to A 12 from X to B 2 from Y to A 6 from Y to B C. 20 from X to A 10 from X to B 0 from Y to A 8 from Y to B D. 16 from X to A 16 from X to B 4 from Y to A 4 from Y to B
Solve the equation for complex solutions.x2 + x + 6 = 0
A. 
, 
B. 
, 
C. 
, 
D. 
, 