Justin is making snowballs to built a fort on the winter break. justin can built 15 snowballs in an hour but 2 snowballs melt every 15 minutes. how long will it take him to build 210 snowballs

Josephine has a great garden with and area of 2x2 + x - 6 square feet

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?