What is the area of a sector with a central angle of 4π3 radians and a diameter of 7.3

Choose the point slope form of the equation below that represents the like that passes through the points (-6,4) and (2, 0)

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle