Question

which three statements are true about all alloys? theyre made from metals combined in equal amounts. theyre harder than the pure metals theyre made of. theyre good conductors of electricity. theyre brittle and prone to cracking. they have a metal as their main component.

Explanation:

Alloys are mixtures of metals or a metal and other elements. They don't have to be in equal - amounts. They are generally harder than the pure metals they are made of due to the different atomic sizes disrupting the regular lattice. Metals are good conductors of electricity and since alloys have metals as a main component, they are also good conductors. Not all alloys are brittle; some are quite ductile. And by definition, they have a metal as their main component.

Answer:

They're harder than the pure metals they're made of.
They're good conductors of electricity.
They have a metal as their main component.