The library is 3 miles from the post office how many yards is the library from the post office

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

What are “like terms”? why can we only add like terms?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)