Find the discriminant. (Must Show Work)

-9m^2+m-7=0

The sum of two numbers is 86, and their difference is 20. find the two numbers

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?

The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²