Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 3x + 5y = -10-2x - 4y = 6
A. (-5, 1)
B. (-1, 5)
C. (5, -1)
D. (1, -5)
Answer: A
Mathematics
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Find the derivative.r = 17 - ?8 cos ?
A. 
= 8?7 cos ? - ?8 sin ?
B. 
= 8?7 sin ?
C. 
= 8?7 sin ? - ?8 cos ?
D. 
= - 8?7 cos ? + ?8 sin ?
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Represent the sets on a number line.{x|x < -2}
A. 
B. 
C. 
D. 
Mathematics
Solve the equation by completing the square.x2 - 4x + 1 = 0
What will be an ideal response?
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Identify and graph the polar equation.r = 4 sin(2?) 
A. 
circle
B. 
rose with four petals
C. 
rose with two petals
D. 
lemniscate
Mathematics