When two figures are similar the ratios of the lenghts of their corresponding sides are equal
Step-by-step explanation:
The answer to the first one is: 4cd+4b.
The answer to the second one is: 2ab+4a+7b+14
(I'm assuming that you want to simplify)
21/22 is the answer change division sign to multiplication and flip the fraction on the right then multiply and divide those answers
