How much is the size of ice cream this science

If square root x = -7, then x= -49 true or false

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

Rick is driving to his uncles house in greenville, which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120