Solve the system of equations by using the inverse of the coefficient matrix. 5x - 6y - 6z = -55 7x + 2y + 3z = 28-8x - 5y + 2z = -51
A. (2, 7, 1)
B. (1, -9, -1)
C. (9, 1, 9)
D. (1, 9, 1)
Answer: D
Mathematics
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Find the slope of the polar curve at the indicated point.r = 
, ? = 4?
A. 0 B. Undefined C. -4? D. 4?
Mathematics
Use implicit differentiation to find dy/dx and d2y/dx2.x2 + y2 = 7
A. 
= - 
; 
= - 
B. 
= 
; 
= 
C. 
= - 
; 
= - 
D. 
= - 
; 
= - 
Mathematics
Use De Morgan's laws to write the negation of the statement.A day late and a dollar short.
A. Not a day late or not a dollar short. B. Not a day late and a dollar short. C. Not a day late and not a dollar short. D. A day late or not a dollar short.
Mathematics
Find an ordered pair that satisfies the given equation and uses the given value of x. y = -x + 5 let x = 3
A. (3, 3) B. (3, 2) C. (3, 6) D. (3, -2)
Mathematics