Need help with this, is this angle HL? I’m confused whether or not HL’s should have a right angle immediately.

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Describe a situation that you could represent with the inequality x< 17