The difference of 3 times a number and 18 is 39 what is the number

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

How do you solving the solution of each system using elimination?

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250