30 points + brainliest
1. simplify the expression 3x^3+9x^4/6x^2

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?

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?

Factor this polynomial completely. 12x^2+ x-6