There 7 ducklings .they sleep in 1 large nest .write and solve an equation that shows how many ducklings sleep in the nest

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?

How do you use the elimination method for this question? explain, because i really want to understand!

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2