1) 8x-13
2)19r-19s
3)8m-10n
Solve in the parentheses then label the ones with the same variable and solve those setting up the equation with variable first. Do check this I am not perfect.
Hope this helped! ;)
\[\sum_{n=1}^{7} 2(-2)^{n-1}\]
Answer:
7.50 is the answer to the question
