Which ordered pair is a reflection of (3,7) across the x-axis?

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?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

What is the absolute value of the complex number -4-sqrt2i