8th grade easy math 1 problem

2c - (c + 6) = 4 (c - 2)

what does "c" equal

The area of a 25-inch tv screen is 300 square inches. the area of a 40-inch tv screen is 768 square inches. the are of the smaller screen is what percent of the area of the larger screen?

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Two consecutive negative integers have a product of 30. what are the integers?