Find the equation of a parabola with a focus at (-2,-3) and a directrix at y=-5. a) y=1/4(x-2)^2-4
b) y=1/4(x+2)^2-4
c) y=1/4(x+2)^2-8
d) y=-1/16(x+2)^2-4

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet