Identify the common external tangent

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.