-3(y-1)=9 find the value of 1/2y

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.