Choose the correct formula for combination.

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?

Jamie has 7/10 of a pound of chicken to cook for dinner if she's going to put the chicken in between three people how much chicken will each person get

Which of the following is not a correct form of the quadratic function?