An executive invests $21,000, some at 8% and the rest at 7% annual interest. If he receives an annual return of $1,570, how much is invested at each rate?

Chamberlin wants to bottle 1\8 of her apple cider. she pours the apple cider evenly among 6 bottles. what fraction of her apple cider will she put in each bottle? what expression could represent this situation?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq