Solve and check. Begin by using the addition or multiplication principles of equality to isolate the squared term. 3x2 = 39
A. ±13
B. ±
C. 19.5
D. 14
Answer: B
Mathematics
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Simplify by finding the absolute value.?10?
A. -10 B. 20 C. 10 D. 0
Mathematics
Use a calculator to give the real number value. Round the answer to 7 decimal places.y = cos-1(0.8910)
A. 0.4712533 B. 0.5063492 C. 1.1000010 D. 0.4365083
Mathematics
Simplify.
A. 1
B. 
C. 0
D. -1
Mathematics
Find all numbers u (if any) so that the given point (u, y) or (x, u) is on the unit circle.
A. ± 
B. ± 
C. None
D. ± 
Mathematics