The mass of an object is 100mg what is the objects mass in kg

If a line is defined by the equation y = 5x + 2, what is the slope?

Quadrilateral abcd is translated up and to the right, and then rotated about point q. which congruency statement is correct?

How many revolutions will a car wheel of diameter 28 in. make over a period of half an hour if the car is traveling at 60 mi/hr? the final answer is supposedly 21,609 but i have no idea how to get that, show work : )