## anonymous one year ago Evaluate the series: Enter a numerical answer only.

1. anonymous

2. anonymous

you have only five numbers to add, so you can do it without any formula

3. anonymous

$2\times 4-1+2\times 5-1+2\times 6-1+2\times 7-1+2\times 8-1$ is your addition

4. anonymous

or $2(4+5+6+7+8)-5$

5. anonymous

thanks

6. anonymous

yw

Find more explanations on OpenStudy