What is the solution to the system of equations below?

X + y + z = 14

y + Z = 7

Z = 3

O A. x = 7, y = 4, z = 3

OB. X = 8, y = 3, z = 3

O c. x = 10, y = 1, z = 3

O D. x = 5, y = 6, z = 3

Haj mixes gallon of water with every 1 cup of a laundry powder. How many gallons of water does he mix with 7 cups of laundry powder? between 3 and 4 gallons between 4 and 5 gallons between 5 and 6 gallons between 6 and 7 gallons

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Which choice is equivalent to the expression below? -81

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