if the ratio of red binders to grey binders is 50:75 and there are 100 red binders, how many grey binders are there

state whether each ordered pair is a soloution of the given problem
6s-9y=42
(10,2)(1,20)

write in simplest form 121 x4 y7
------------------
11 x3 y5

simplify
5
( -- t3) (15t2)
3

express as a fraction and a mixed number
720%

write in scientific notation
.0000000000000000000000000042