Summarize the three formulas that you derived for the area of acute triangle ABC . Also describe the formulas in word form, using your own words

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?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?