Tim has some marbles sue has twice as many as tim
jim has 15 marbles

tim, sue and jim have all together 63 marbles
how many does tim have?

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?