Solve using elimination. 8x + 7y = 9
8x + 10y = –18

please help i am in desperate need of math help

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Write the factored form of this trinomial 9x^2+18x-7