Which is the equation of a parabola with Vertex (0,0) and focus (0, 2)? c. - 8y
a. y2 = 87
d. x - 4y
b. y2 = 47

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

How can you construct perpendicular lines and prove theorems about perpendicular lines

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]