susie had 3 pencils. her friend gave her some more pencils for her birthday. now susie has a total of 5 pencils. how many pencils did her friend give her for her birthday?

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?