Solve the system of equations.2x + y = 0 x - 3y + z = 03x + y - z = 0

A. (0, 0, 0)
B. (0, 1, 0)
C. No solution
D. (1, 0, 0)


Answer: A

Mathematics

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Solve the problem.A tank initially contains 100 gal of brine in which 40 lb of salt are dissolved. A brine containing  of salt runs into the tank at the rate of 4 gal/min. The mixture is kept uniform by stirring and flows out of the tank at the rate of 3 gal/min. Find the solution to the differential equation that models the mixing process.

A. y = 4(50 + t) - 
B. y = 4(50 + t) - 
C. y = 2(100 + t) - 
D. y = 2(100 + t) - 

Mathematics

State which type of average, the mean, median, or mode, would be most appropriate in the situation described. Explain your thinking.Before a mayoral election, a pollster tries to predict which candidate will win the most votes. Which average does the pollster need to know?

What will be an ideal response?

Mathematics

Find all the second order partial derivatives of the given function.f(x, y) = ex/y

A.  =  = ex/y;   =  = -ex/y
B.  =  = ;   =  = 
C.  =  = -ex/y;   =  = ex/y
D.  =  = ex/y;   =  = -ex/y

Mathematics

Provide an appropriate response.What is always the last step when dividing a polynomial by a polynomial?

What will be an ideal response?

Mathematics