To join a local square dancing group, jan has to pay a $100 registration fee plus $20 per month. how many months can she dance for $400? can you also show the work plz

1. preform the indicated operation. then estimate to see whether the proposed result is reasonable. 811.1 - 8.039 803.071 803.061 803.161 831.061 2. the ordered pair (1, 2) lies in which quadrant? quadrant ii quadrant iv quadrant iii quadrant i 3. sean tries to drink 3 liters of water every day how my millimeters of water does he drink in a day? 0.3 ml 0.003 ml 3,000 ml 30 ml 4. find the least common multiple. (lcm). 10, 36 5 180 20 360

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?