Which of the following is a radical solution ? x+sqrt5=12
x^2=16
3+xsqrt7=13
7sqrtx=14

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same