Which could be the equation of the parabola? A parabola with a vertex at (0,0) has a directrix that
crosses the negative part of the y-axis,
O x2 = -4y
O x² = 4y
O y2 = 4x
O y2 = -4x

seems like d

step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

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d.) yes, because the volume of the cone is greater than the volume of the sphere

step-by-step explanation: