Answer the questions in the pictures below. Answer seriously pls :)

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?