HELP PRECALC WILL GIVE BRAINLIEST

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

We just started the introduction into circles and i have no idea how to do this.