How do I solve x/4+9=15

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

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?

Once george got to know adam, they found that they really liked each other. this is an example of what factor in friendship