I need help with #53 to #60 ASAP … please help this I don’t understand this …. It was due today … can someone please help me with it And show step by step please

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

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250