Solve the problem. Leave your answer in polar form.z = 5(cos 200° + i sin 200°)w = 4(cos 50° + i sin 50°)Find 
.
A. 
(cos 40° + i sin 40°)
B. 
(cos 150° + i sin 150°)
C. 
(cos 40° + i sin 40°)
D. 
(cos 150° + i sin 150°)
Answer: B
Mathematics
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State whether the parabola opens upwards or downwards.y = 
x2 - 2
A. Upwards B. Downwards
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Solve the problem.A ladder is resting against a wall. The top of the ladder touches the wall at a height of 12 ft. Find the length of the ladder if the length is 4 ft more than its distance from the wall.
A. 24 ft B. 16 ft C. 20 ft D. 12 ft
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Use the quadratic formula to solve the equation.2x2 - 5x - 7 = 0
A. 
B. 
C. 
D. 
Mathematics
Determine whether b is in the column space of A.A = 
, b = 
A. Yes B. No
Mathematics