Which statements are true of heterogeneous mixtures. 1) they settle out 2) the proportions of solute to solvent may vary 3) the saw you is evenly distributed throughout 4) they are composed of two solvents and two solutes

Heterogeneous Mixtures are those in which the components are not uniform, means they don't form a true solution. For example when you mix sand with water and shake it, after some time the sand will settle down and can be easily separated.
And these mixtures can be formed by mixing the components in any proportion.

Result: 
         Option A ( They Settle down) and Option B (mixed in any proportion) are the correct answers.

A, it is falling action my have a good day