A bar of copper has a mass of 216 g and a volume of 24 cm3. what is the density of copper?
9g/cm3
5189g/cm3
11g/cm3
322 ml

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

How do you determine if an ordered pair is a solution to a given equation?