Find x in the triangle

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°

What is r i 4.5+10r=-6.5 with work pls

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83