Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?
x squared over 8 plus y squared over 4 equals 1
x squared over 16 plus y squared over 4 equals 1
x squared over 8 minus y squared over 4 equals 1
x squared over 16 minus y squared over 4 equals 1

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

Combine the information in the problem and the chart using the average balance method to solve the problem.

Use this graph to find the cost of 6 show tickets