3. (-4, -5); y= 1/2x - 6

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Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?