Use commutative property to write an expression equivalent to 5 + 7 + 9

ASAP

What is the volume of the sphere shown below with a radius of 3?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)