Determine if the given regular figures form a vertex figure.Square, hexagon, 12-gon
A. Yes
B. No
Answer: A
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Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.2x - 2y + 3z = -7x + 2y - z = 102y + z = 1
A. ? B. {(3, 11, -11)} C. {(-3, 2, 9)} D. {(3, 2, -3)}
Solve the problem.There are currently 67 million cars in a certain country, increasing by 2.4% annually. How many years will it take for this country to have 91 million cars? Round to the nearest year.
A. 132 yr B. 4 yr C. 13 yr D. 10 yr
Solve the problem.How many different three-digit numbers can be written using digits from the set {5, 6, 7, 8, 9} if digits may not be repeated?
A. 120 B. 60 C. 10 D. 20
Find the vertex, focus, and directrix of the parabola. Graph the equation.(x - 3)2 = (y - 3)
A. vertex: (3, 3)
focus: (3.25, 3)
directrix: x = 2.75
B. vertex: (-3, -3)
focus: (-2.75, -3)
directrix: x = -3.25
C. vertex: (3, 3)
focus: (3, 3.25)
directrix: y = 2.75
D. vertex: (-3, -3)
focus: (-3, -2.75)
directrix: y = -3.25