Describe each fundamental characteristic of science in your own words. Observable:

Testable:

Replicable:

Reliable:

Flexible:

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.

: -)

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.