I Need help! And quick! My class is learning algebra pt 1, and I am lost. (Methods for solving linear equations) Can any one help me?

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.