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 y=-4x

step-by-step explanation:

hjkj

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

a is the right answer

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.