Which of the following is equivalent to | − 12 + 3 | ?

The measurement of one angle of a right triangle is 34°. what is the measurement of the third angle?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

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?