Can someone please help me with this problem? its in the picture :)

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Find the nonpermissible replacement for binthis expression.b2/5b +5

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°