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Ifx equals -1andy equals 2 what is the value of the expression 2x3-3xy?

2x^2+3xy-4y2(4)+3(2)(-4)-(4)(-4)8-24+16=0


What are the solutions to the simultaneous equations of x -2y equals 1 and 3xy -y squared equals 8?

They are: (3, 1) and (-11/5, -8/5)


What is the answer to this math question 3xy-xy-2y plus 5y?

That equals 2xy + 3y which factors to y(2x + 3)


What describes the translation of the graph of y equals x2 to obtain the graph of y equals -x2 - 3?

No translation will invert a quadratic graph.


If X equals -1 and y equals 2 what does 2x3-3xy equal?

x = -1 y = 2 2x3 - 3xy = 2 (-1)3 - 3(-1)(2) = 2 (-1) - (-6) = -2 + 6 = 4 Suggestion: Please be careful around problems like this until you have some more experience.


What describes how to translate the graph of y equals x to obtain the graph of y equals x plus 1 - 2?

3


What are M and Y if Y plus y plus y plus equals MY?

M=3 because y+y+y= 3xY and MY= MxY


What is the transformation of the graph of y equals x2 to obtain the graph of y equals -x2 plus 3?

First, reflect the graph of y = x² in the x-axis (line y = 0) to obtain the graph of y = -x²; then second, shift it 3 units up to obtain the graph of y = -x² + 3.


Graph the linear equation y equals 0.75x - 3?

-2.25


Plot the line y equals 3?

The graph is a horizontal line at y=3


Solve the system of equation using substitution 2x plus 5y equals 2 and -3x-y equals -3?

2x + 5y = 2-3x - y = -3from the second equation:-y = -3 + 3xy = 3 - 3xsubstitute this value in the first equation:2x + 5(3-3x) = 22x + 15 - 15x = 2-13x + 15 = 2-13x = 2 - 15-13x = -13so, x = 1Now, solve for y :y = 3 - 3xy = 3 - 3 (1)y = zero


What is the value of the expression 2x2 plus 3xy-4y2 when x equals 2 and y equals -4?

2(2)2 + 3(2)(- 4) - 4(- 4)2 8 - 24 - 64 = - 80 ======