What is the area of a regular pentagon with a side of 20 inches? can you explain?

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

In which form is the following function written? y = - 2(x – 3)(x + 5)

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?