The product of two numbers is 49 and the difference of those numbers is 13 what are the numbers

Can someone me with this problem i don't understand i need

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!