Simplify. Write your answer in the form a + bi, where a and b are real numbers.(19 + 8i) - (6 + 2i)
A. -13 + 6i
B. -13 - 6i
C. 13 + 6i
D. 13 - 6i
Answer: C
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Solve the problem using determinants.Barges from ports X and Y went to cities A and B. X sent 28 barges and Y sent 8. City A received 20 barges and B received 16. Shipping costs $220 from X to A, $300 from X to B, $400 from Y to A, and $180 from Y to B. $8240 was spent. How many barges went where?
A. 20 from X to A; 8 from X to B; 0 from Y to A; 8 from Y to B B. 18 from X to A; 10 from X to B; 2 from Y to A; 6 from Y to B C. 16 from X to A; 16 from X to B; 4 from Y to A; 4 from Y to B D. 14 from X to A; 14 from X to B; 6 from Y to A; 2 from Y to B
Assume you have a digraph with 5 vertices (A, B, C, D, and E) and 9 arcs. A is incident from C, D, and E; B is incident to D and E and incident from C; D is incident to C and incident from E.How many cycles are there in the digraph that start and end at A?
A. 0 B. 3 C. 2 D. 1 E. none of these
Write the interval as an inequality involving x. Graph the inequality.[-5, ?)
A. x ? -5
B. x ? -5
C. x < -5
D. x > -5
Write the fraction in simplest form.
A. 
B. 
C. - 
D. 