Solve the system analytically. x - y + 4z = 16-2x + 2y - 8z = 3 x + 2y + z = 11
A. ?
B. {(3, 0, 4)}
C. {(3, 4, 0)}
D. {(0, 4, 3)}
Answer: A
Mathematics
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Find the center and radius of the circle.x2 + y2 - 4x - 18y = -36
A. (9, 2), r = 7 B. (-9, -2), r = 49 C. (2, 9), r = 7 D. (-2, -9), r = 49
Mathematics
Solve the problem. Round your answer, if appropriate.In a certain memory experiment, subject A is able to memorize words at a rate given by 
In the same memory experiment, subject B is able to memorize at the rate given by 
How many more words does subject B memorize from t = 0 to t = 15 (during the first 15 minutes)?
A. 19 B. -10 C. 12 D. -3
Mathematics
Use radical notation to write the expression. Do not simplify.m8/3
A. 
B. 
C. 
D. 
Mathematics
Perform the addition visually using symbols.-5 + (-2)
A. 3 B. -7 C. -3 D. 7
Mathematics