$\"\"$

\

The 5th term is $\"\"$ and 10th term is $\"\"$ .

\

(Apply nth term of an arithmetic sequence formula: $\"\"$ )

\

$\"\"$

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$

\

$\"\"$ (Substitute 115 for $\"\"$ ) $\"\"$

\

$\"\"$ -----------------------> (1)

\

$\"\"$ -----------------------> (2)

\

$\"\"$ (Subtracting equation (1) from (2))

\

$\"\"$ (Divide each side by negative 5)

\

$\"\"$ (Simplify)

\

$\"\"$ (Substitute $\"\"$ for d)

\

$\"\"$ $\"\"$

\

$\"\"$ (Add 60 to each side)

\

$\"\"$ (Simplify)

\

First term is $\"\"$ and common difference is $\"\"$ .

\

(Apply nth term of an arithmetic sequence formula: $\"\"$ )

\

$\"\"$ (Substitute $\"\"$ and $\"\"$ for d)

\

$\"\"$ $\"\"$

\

The nth term of the arithmetic sequence formula is $\"\"$ .