Explain why atoms move at different speeds depending on whether that are in liquids or solids

Turn it around and you'll have it.

The atom doesn't say "Oh gosh, I'm in a liquid now,
I'll have to move faster."

When the atoms have generally low energy, that means they're 
moving relatively slowly ... just kind of jiggling in place but not
going on any long trips ... and you have a solid.

If you GIVE the atoms more energy, that means now they're
moving faster, and are able to move away from their places
and flow like a liquid.

And if you give them even MORE energy and make them move
even faster, then they're free to shoot around wherever they want,
the liquid evaporates, and they form a gas. 

They don't move fast because they're in a gas.
They form a gas because they're moving fast.

Pretty ssure the answer re her answer is b hope this : )

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.