The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable
Answer:
You can use equation or use a calculator.
Step-by-step explanation:
The stock market increased 75 point: = +75 or 75
I’m sorry, I don’t know perpendicular but I would love to help.
