Solve the system of equations using the inverse of the coefficient matrix.5x + 4y = 8-4x + 2y = -22

A. x = 4, y = -3
B. x = -4, y = 3
C. x = -3, y = 4
D. x = 3, y = -4


Answer: A

Mathematics

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Find all the first order partial derivatives for the following function.f(x, y) = 

A. fx(x, y) = -  ; fy(x, y) = - 
B. fx(x, y) =  ; fy(x, y) =  
C. fx(x, y) = -  ; fy(x, y) = - 
D. fx(x, y) = -  ; fy(x, y) = - 

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Find the probability.A lottery game contains 22 balls numbered 1 through 22. What is the probability of choosing a ball numbered 23?

A.
B. 0 
C. 1 
D. 22 

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Use the distributive law to write an equivalent expression.-6(9m - 4)

A. -24m + 54 B. -54m - 24 C. 24m - 54 D. -54m + 24

Mathematics