How do you know which formulas to use when solving a word problem?

Hmmm, there is no rule when you have a word math problem and also there is no specific forumula that you use when you need to solve word problem. It is all about logic. If you want, you can post question (specific word problem) and we will anwer it and explain how to solve it.

When solving a word problem, you determine which formulas to use based on the information given and the type of problem. Read the problem carefully to identify the quantities involved and the relationships between them. Then, choose the appropriate formula that relates to the given quantities and the unknowns you need to solve for. It may be helpful to break down the problem into smaller steps and use diagrams or tables to organize the information. Practice and familiarity with common formulas in different areas, such as geometry, algebra, and physics, will also aid in selecting the correct formula.