How do you do this please explain!

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

If you double the input of a function and it results in half the output, and if you triple the input and it results in a third of the output, what can be guessed about the function? check all that apply.

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.