Hailey is categorizing, on the basis of predominance, the most important greenhouse gases. Which of the gases should she give priority to in her ranking? Hailey is categorizing, on the basis of predominance, the most important greenhouse gases. She has classified as the most important and as the next most important greenhouse gas.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

six grader is what i am ssorry

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: