Use the equation f(s)=8s+15 to evaluate the function at each value. explain what each means in terms of the problem

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?

What is the anwers for 9+2x=5x-3-x

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)