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
Answer: C
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Integrate the function f over the given region.f(x, y) = e2x + 3y over the rectangle 0 ? x ? 1, 0 ? y ? 1
A. 
(e5 - e3 - e2 + 1)
B. 
(e5 - e3 - e2 - 1)
C. 
(e5 - e3 - e2 + 1)
D. 
(e5 - e3 - e2 - 1)
Give the number of rows in the truth table for the compound statement.p ? (~q ? r)
A. 9 B. 3 C. 8 D. 6
Find all solutions of the equation in the interval [0°, 360°). Round the answers to the nearest tenth of a degree.cot (? - 30°) = -2
A. {56.6°} B. {236.6°} C. {183.4°} D. {56.6°, 236.6°}
Evaluate 
.
?
A. 
B. ?
C. 
D. 
E. 