Hi mate thanks for the free POINTS​

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

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Carli has 90 apps on her phone. braylen has half the amount of apps as theiss. if carli has three timesthe amount of apps as theiss,how many apps does braylen have? let b represent the number of braylen's apps and t represent the number of theiss's apps.