How do you do this for expanding and factoring expressions 8(4x-12)

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

What is the radius of the cone in the diagram? round your answer to the nearest whole number

Mallory has been offers two different jobs. she can baby sit for 6 hours a week and get $8.50 an hour. or she can work at the library for 14 hours a week and make $5.50 an hour. which job will allow her to save the most money after 6weeks?