What are the differences between continuous and non-continuous growth?

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"