Write the equation for a parabola with the vertex at (-1, 3) and the equation of the directrix y = 1.
(x - 1)2 = (y + 3)
(x + 1)2 = 8(y - 3)
(x - 1)2 = 8(y + 3)
(y - 3)2 = 2(x + 1)
DONE

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling