What's 15⁄45 written as a fraction in simplest form?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250