Help with 7 and 8 and explain

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

An empty bucket is placed under a faucet dripping at a constant rate of 4 milliliters per minute. with the given information, which of these statements is a reasonable conclusion? a there will be 24 milliliters of water in the bucket after 16 hour. b there will be 60 milliliters of water in the bucket after 14 hour. c there will be 160 milliliters of water in the bucket after 20 minutes. d there will be 100 milliliters of water in the bucket after 40 minutes.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then