What is the fourth step in creating a summary

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?