Solution:
Michael wants to put new hardwood floors in his kitchen and dining room areas.
Given;
The side lengths of the kitchen and dining room are as follows

To find the area, A, of the rooms, we will apply the formula to find the area, A, of a rectangle
The formula is

For the area of the kitchen

For the area of the dining

The square feet of hardwood he needs in order to cover both rooms will be

Hence, the answer is 290 ft²