In quadrilateral ABCD, the slope of AB is 5/9. If the quadrilateral is a rectangle, what would be the slope of BC?

Trigonometry hellllllpppppppp asap

Select the quadratic that has root x = 8 and x = -5

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?