Which property of equality would be used to isolate the variable a in this equation?
a-4 = 12
A addition property of equality
B. subtraction property of equality
C. multiplication property of equality
D. division property of equality
Please select the best answer from the choices provided

Ineed if you could explain and give me the answer you! this needs done

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?