What is the value of x

Which of the following of the following sets of side lengths could not form a triangle?

The verbal translation for the difference of m and 7 increased by 15

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!