La concursul de matematica distractiva Ana a rezolvat corect 5 exerciții și 6 probleme obținând 85 de puncte . Știind ca pentru doua probleme se acorda tot atâtea puncte cat pentru 4 exerciții, afla câte puncte se acorda pentru un exercițiu rezolvat corect și cate pentru o problema.

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?

3x = 729 solve for x plz . it's urgent. will mark