ASSESSMENT write a variable expression to represent each of the following. Use the variable n to represent the unknown number 1. The sum of a number and twelve 2. The difference between a number and eight. 3. Three times a number 4. A number squared plus five 5. A number divided by two plus seven 6. Four times the quantity of a number plus six 7. A number times two divided by four 8. Twice a number added to eight 9.A number squared plus seven take a way four 10. A number divided by three plus twelve​