Distance & Directed distance? Synthesis

Will give brainliest series to sigma notation write the following series in sigma notation. 6+10+14+18+22+26+30 example image shown below.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?