Which of the following did Aristotle use to support his theory that the Earth was not flat?
different constellations seen by people in the North and South
oblate spheroid calculations
Earth's diameter
satellite images
shadow of the Earth during an eclipse

obviously he used the earth shadow when a eclipse occurred

Explanation:

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.

: -)

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.