Question

Which expressions are equivalent to 4b? 1.b+2(b+2b)
2.3b+b 3.2(2b)

Answer 1

b+2(b+2b) = 7b so this is incorrect.

3b + b = 4b (correct)

2 * 2b = 4b (correct)

The answer is 3b + b and 2 (2b)