Help me I don't know any ​

Peaches cost $4.29 per pound. find the cost of two and a quarter pounds of peaches.

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.