Given the equation sqrt(2x+1)=3 solve for y and identify if it is an extraneous solution

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?

It is 5.8 you add all of the up to equat 180 then solve the equation

4is the answer. hope this !