Match the system of inequalities with one of the graphs.
A. 
B. 
C. 
D. 
Answer: A
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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
Rewrite the number as a product of a whole number and a power of 10.2,400,000
A. 245 ? 10 B. 24 ? 104 C. 24 ? 105 D. 24 ? 106
Use the definition of inverses to determine whether f and g are inverses.f(x) = 7x - 7, g(x) = 
x + 1
A. No B. Yes
Find the vertices and the foci of the given ellipse.
+ 
= 1
A. V: (0, -20), (0, 20); F: (0, -12), (0, 12) B. V: (-20, 0), (20, 0); F: (0, -16), (0, 16) C. V: (-20, 0), (20, 0); F: (-12, 0), (12, 0) D. V: (0, -20), (0, 20); F: (-16, 0), (16, 0)