Answer:
Not exactly sure about what should be under "answers", but for constant and variable:
1. Constant=10; Variable=b
2. Constant=-10; Variable=3h, 7g
3. Constant=5; Variable=[tex]\frac{1}{2}xy[/tex]
(EDIT) Possible entries for "answers":
1. 10b
2. 3h+7g-10
3. [tex]\frac{1}{2} xy+5[/tex]
