Twenty people are going by van to a movie each van seats 8 people how many vans are needed to take everyone

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32

Ineed to know how to write question one in mathematical terms