Use a Formula For $S_{\mathbf{n}}$ To Evaluate the Series $\sum_{\mathrm{i}=1}^{6}\left(-\frac{5}{2} \mathrm{i}+3\right)$ A) $-\frac{69}{2}$

Multiple Choice

Use a formula for $S_{\mathbf{n}}$ to evaluate the series.
- $\sum_{\mathrm{i}=1}^{6}\left(-\frac{5}{2} \mathrm{i}+3\right)$

A) $-\frac{69}{2}$

B) -12

C) -36

D) $-\frac{23}{2}$