If using the method of completing the square to solve the quadratic equation x^2 + 7x - 4= 0 which number would have to be added to "complete the square"? By the way the 2 in x^2 is a exponent

Acircle has a circumference of 28.36 units what is the diameter of the circle

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

The paint recipe also calls for 1/4 cup of food coloring. tyler says mrs.mcglashan will also need 6 cups of food coloring. do u agree or disagree? explain.