Focus (-4,0) directrix x=4
A)x=-1/8y^2
B)x=-1/16y^2
C)x=1/8y^2
D)x=1/16y^2

Emma will roll two number cubes labeled 1 through 6. she will record the sum of the two numbers after each roll. she will roll the two cubes 540 times. how many times should emma expect the sum to equal 5?

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2