The slope of the line is?

7/2

Step-by-step explanation:

slope = rise / run

The sum of each of the angles in a triangle always equals 180. We are given angles A and C so all we need to do is add them together and subtract from 180 to find the missing angle.

Angle C is 34
Angle A is 90 (that little box indicates 90)
34+90=124
180-124=56

Ange B is 56 degrees.

Hope this helps!!