Which expression is equivalent to 6.317x+ 19?

The transitive property of equality states that: o if a = b, then bra o if a = b, then ac = bc o if a = b and b= c, then a = if a = b and c= c, then a + b = b + c

Asphere has a diameter of 10 in. what is the volume of the sphere?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?