When the moon lies between the sun and the Earth, causing the moon to cast a shadow on Earth, what type of eclipse is taking place? *
A. Solar eclipse; Earth enters the moon's shadow
B. Solar eclipse; Moon enters earth's shadow
C. Lunar eclipse; moon travels through Earth's shadow
D. Lunar eclipse; earth travels through Moon's shadow

the form of energy changes and the total energy increases0l

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.

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i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

a and c are the answeres