Find the sign of the following.cos (? + 180°), given that ? is in the interval (90°, 180°).
A. positive
B. negative
Answer: A
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Solve the problem.A parking lot measures 
by 
. A sidewalk of uniform width is to completely surround the lot. If the sidewalk can cover 
, how wide will the sidewalk be?
A. 2 ft B. 2.5 ft C. 3 ft D. 1.5 ft
Write the fraction.There are 100 centimeters in a meter. What fractional part of a meter does 39 centimeters represent?
A. 
B. 
C. 
D. 
Use a graphing calculator to solve the system by finding A-1 and A-1B. (Round to the nearest integer if necessary.)
A. {(2, 0, 1)} B. {(1, -2, -1)} C. {(2, 1, 2)} D. {(1, 2, 1)}
The graph of two equations along with the points of intersection are given. Substitute the points of intersection into the systems of equations. Are the points of intersection solutions to the system of equations (Y/N)?
x2 + y2 = 522y+3x = 0
A. Yes B. No