Determine whether the statement is true or false.The sum of a positive number and a negative number is always a negative number.
A. True
B. False
Answer: B
Mathematics
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At what points is the given function continuous?f(x, y) = 
A. All (x, y) such that 7x + 8y ? 0 B. All (x, y) such that 7x + 8y ? 0 C. All (x, y) D. All (x, y) such that x + y ? 0
Mathematics
Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.1.4x - 0.5y - 5.0z = 2.73.4x - 6.3y - 1.3z = -3.23.7x - 1.5y - 1.7z = 9.6
A. (14.8, 9.8, 1.0) B. (7.4, 4.9, 0.5) C. (3.7, 2.5, 0.3) D. (18.5, 12.3, 1.3)
Mathematics
Find the root.
A. 6.233 B. Not real number C. 4 D. 16
Mathematics
Find the vertices of the ellipse.
+ 
= 1
A. (4, -16), (4, 24) B. (-12, 4), (20, 4) C. (4, -12), (4, 20) D. (-16, 4), (24, 4)
Mathematics