What's the word format and expanded form for 3.4

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

Travis and paula went to lunch.travis ordered a sandwich for $7.50 and paula ordered a burger for $5.25.after lunch,they left a 15% tip for the waiter.how many money did they spend altogether?

Three lines meet at a point. set up and solve an equation to find the value of (a) is your answer reasonable? explain how you know