Find the exact value of the trigonometric expression without the use of a calculator.tan 255°
A. 
- 2
B. 
+ 2
C. - 
- 2
D. - 
+ 2
Answer: B
Mathematics
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Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination. x + y + z = 3 x - y + 5z = 253x + y + z = 13
A. (3, 5, -5) B. (5, -5, 3) C. (3, -5, 5) D. No solution
Mathematics
Simplify.(61.3 - 3.5) × 14
A. 8092 B. 809.2 C. 12.3 D. 823.2
Mathematics
Solve the problem.How much will it cost to carpet a rectangular room measuring 19 ft by 13 ft if carpeting costs $16.00 per square yard?
A. $439.11 B. $1317.33 C. $329.33 D. $3952.00
Mathematics
Fill in the blank.The opposite of -16 = 
.
A. -16
B. 0
C. 16
D. 
Mathematics