2u+2=5u-10 how do I simplify the expression

Alaina wants to decide whether her current cell phone plan is better than a package that another company offers. to compare the two plans, she plotted two lines on a graph, where y represented the total cost of one month’s service and x represented the megabytes of data that she used in a month. which part of the graph will represent the cost per megabyte of data used in each plan?

How did the korean war impact the elections of 1952?

The graph below plots the temperature and luminosity of stars on the main sequence.