Twice the sum of a number and 7 is equal to 3

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here

What are the domain and range of the function f(x)=2^x+1