Abackyard is 15 yards wide and 18 yards long. how many yards of fencing do you need to go around the entire fence?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

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

Identify the number 127 as a rational or irrational. explain