Which of the following terms can be combined in this expression? 13 minus StartFraction x over 5 EndFraction + 6.2 y + 20.5 x minus StartFraction 3 over 8 EndFraction y Negative 13 can be combined with 20.5. 6.2 y can be combined with 20.5 x. 6.2 y can be combined with Negative StartFraction 3 over 8 EndFraction y. Negative StartFraction x over 5 EndFraction can be combined with Negative StartFraction 3 over 8 EndFraction y.

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step-by-step explanatio89

look at photo

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.