Isaac has 21 green marbles and seven blue ones if you wants to place them in identical groups without any marbles left over what is the greatest number of groups as that can make

Can someone me with the property questions for 12 13 and 14 plz

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.