How to solve x, for both questions ?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.