The ratio of black pencils to colored pencils in Lauren's backpack is 1:9

Use the net as an aid to compute the surface area of the triangular prism. a) 550 m2 b) 614 m2 c) 670 m2 d) 790 m2

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.