Working with functions PLS HELP

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer