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Ilia_Sergeevich [38]
3 years ago
13

Evaluate the expression for the given values. (5 x - 4 y) 2 given x = 1 and y = -1.

Mathematics
1 answer:
Reika [66]3 years ago
3 0

((5 \times 1) - (4 \times  - 1)  =  \\ 5 - ( - 4) =  \\ 5 + 4 =  \\ 9

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Solve the system of equations by graphing: -1/3x + y=-1, y=4+1/3x
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-\frac{1}{3}x + y = -1   ⇒   y = \frac{1}{3}x - 1

To graph this line, plot a point at the y-intercept (0, -1), than plot the next point using the rise over run from the slope (\frac{1}{3}) by counting up 1 and to the right 3 of the y-intercept.  This gives you a second point of (3. 0).  Draw a line through those two coordinates.

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***************************************************************************************

y = 4 +  \frac{1}{3}x    ⇒   y =  \frac{1}{3}x  + 4

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You should end up with two PARALLEL lines.  Since the lines never intersect, there are no solutions to this system of equations.

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