Find the opposite of the number.15
A. - 
B. 
C. 15
D. -15
Answer: D
Mathematics
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Use a calculator to find the value of the expression rounded to two decimal places.cos-1 
A. -0.96 B. 2.53 C. 144.74 D. -54.74
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Find the perimeter.
A. 552 ft B. 542 ft C. 367 ft D. 46,617 ft
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Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z=-5 x - y + 4z=-134x + y + z=-2
A. {(1, -4, -2)} B. {(-4, 1, -2)} C. {(1, -2, -4)} D. {(-4, -2, 1)}
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Write the decimal as a fraction or mixed number in lowest terms.0.5
A. 
B. 
C. 
D. 
Mathematics