Leonardo bought four snacks that cost $0.50, $1.00, $1.50, and $1.00. what is the average of the deviations from the mean?

These question are hard can you me with answers

Explain how you can use the associative property to evaluate (7x50)x4.

Sandy is ordering bread rolls for her party, she wants 3/5 of the rolls to be whole wheat. what other factions can represent part of the rolls that will be whole wheat? shade the models to show your work.