Find the equation to the ellipse, whose focus is the point `(-1,1),`whose directrix is the straight line `x-y +3=0,` and whose eccentricity is `1/2.`

Find the equation of the parabola whose focus is the point (0,0) and the directrix is the straight line 3x-4y+2=0

Find the equation of the parabola whose focus is at (-1, 1) and the directrix is x+y+1=0 .

Find the equation to the ellipse whose foci are (4, 0) and (-4, 0) and eccentricity is 1/3 .

Find the equation of the ellipse whose focus is S(-1,1), the corresponding directrix is x-y+3=0, and eccentricity is 1/2. Also find its center,the second focus,the equation of the second directrix,and the length of latus rectum.

Find the equation of the ellipse whose foci re (4,0) and (-4,0) eccentricity =1/3

Find the equation of the parabola whose focus is at (-1,-2) and the directrix the line x-2y+3=0

Find the equation of the parabola whose focus is (5,3) and directrix is the line 3x-4y+1=0.

Find the equation of the parabola whose: focus is (3,0) and the directrix is 3x+4y=1

Find the equation of the parabola whose focus is (-1, 2) and directrix is x-2y-15=0 .

Find the equation of the ellipse whose foci are (0,pm1) and eccentricity is (1)/(2) .