Which one is the correct one?

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Which graph represents the parent function of y=(x+2)(x-2)

Were only 64 seats. the remaining 6 students had to travel in a separate van. the equation 2b + 6 = 70 represents the given scenario. what does b represent? the number of buses the number of vans the number of students who rode on each bus the total number of students going to the football game