Owen found harry potter books for $12.38 each. he would like to buy one for each of his 4 friends. how much will he spend?

How is working backward similar to solving an equation?

Write the pair of fractions as a pair of fractions with a common denominator

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1