Write the following in algebraic form:
Seven added to, eight times a number divided by two.

Write the following in algebraic form: The 'a' is multiplied by twenty and added to the seven.

Write the following sets in the tabular form: {x : x is a positive prime number which divides 72 }

Write each of the following in numeral form: Eight million seven hundred eight thousand four. Six hundred seven million twelve thousand eighty four. Four billion twenty five million forty five thousand.

Write the following as decimal : Two ones and eight thousandths.

Write the following sets in the tabular form: E={x : x is a natural number that divides 24} .

Express the following as algebraic expressions: Sum of two consecutive numbers is 15.