Which of the following is a step in constructing a circle circumscribed about a triangle? (6 points)

construct the perpendicular bisectors of each side.
construct the angle bisectors of each side.
use a compass to locate the midpoint of each side.
use a compass to locate the altitude of each side.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

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?

How many solutions does the nonlinear system of equations graphed below have?