Tim and sue share a small pizza. tim eats 2/3 o the pizza

Sue eats 1/3 of the pizza

Step-by-step explanation:

Sue eats 1/3 of the pizza

Step-by-step explanation:

3/3 - 2/3 = 1/3

This is combined variation

Step-by-step explanation:

We have been given en equation

This is an equation in which we have three variables and one constant

This can not be the case of direct or inverse variation because in direct or inverse variation we have only two variables. Whereas, here we have three variables.

So, Direct and inverse options are discarded.

So, either It can be joint or combined

In joint variation both the variables are directly proportional

Hence, given equation is not joint because if we rewrite the equation we will get both the variables are not directly proportional.

In combined one variable is directly proportional and the other one is inversely proportional.

from   we can see that z is directly proportional and x is inversely proportional.

Therefore given equation is combined variation.