Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination. x + 5y = 442x + 5y = 43
A. (-1, 9)
B. (0, -1)
C. (0, 8)
D. No solution
Answer: A
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Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.-15 + 20i
A. 25(cos 126.9° + i sin 126.9°) B. 25(cos 233.1° + i sin 233.1°) C. 25(cos 53.1° + i sin 53.1°) D. 25(cos 306.9° + i sin 306.9°)
Draw the graph of the equation and label the vertex.
A. 
B. 
C. 
D. 
Draw the given angle in standard position. Draw an arrow representing the correct amount of rotation. Find the measure of two other angles, one positive and one negative, coterminal with the given angle.130°
A. 310° and -50°
B. 490° and -230°
C. 490° and -230°
D. 310° and -50°
Solve the problem.The roof of a building is in the shape of the hyperbola 
where x and y are in meters. Refer to the figure and determine the height h of the outside walls. Round to the nearest tenth when necessary.
a = b = 6 m
A. 50 m B. 8 m C. 22 m D. 7.1 m