Find the sum of the following APs:

$-37, -33, -29, ...,$ to $12$ terms.

Find the sum of the A.P $0.6, 1.7, 2.8, ...,$ to $100$ terms.

Find the sum of the A.P. $\frac{1}{15}, \frac{1}{12}, \frac{1}{10}, ...,$ to $11$ terms.

Find the sum given below as a decimal number.

$7+10\frac{1}{2}+14+\dots .+84$

Find the sum of the series given below

$34+32+30+\dots +10$

Find the sum given below:

$-5+\left(-8\right)+\left(-11\right)+ ... +\left(-230\right)$

In an AP:

Given $a=5, d=3, a_n=50$, find $n$ and $S_n$.

In an AP:

Given $a=7, a_{13}=35$, find $d$ and $S_{13}$.

In an AP:

given: $a_{12}=37, d=3$, find $a$ and $S_{12}$.