Atextbook store sold a combined total of 405 math and chemistry textbooks in a week. the number of math textbooks sold was two times the number of chemistry textbooks sold. how many textbooks of each type were sold?

the height of the surface increases from the center out to the sides of the road

it is c!

hi i’m going tomorrow morning and i can come over and you out with this stuff for me haha ya day is going crazy and i’ll tell you what i’m talking about you don’t wanna go do you think i’m going to be a good friend i just don’t know how much you mean about the stuff you want to do and stuff you know i just want you and you know that i’m going crazy i don’t think i’m going crazy about going tomorrow and i’ll tell ya hey i don’t think i’m going crazy about going tomorrow and i’ll tell you what i’m done