Solve the system of equations.7x + 7y + z = 1 x + 8y + 8z = 89x + y + 9z = 9
A. (1, -1, 1)
B. (0, 1, 0)
C. (-1, 1, 1)
D. (0, 0, 1)
Answer: D
Mathematics
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Solve.In a chemistry class, 7 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 4.5 L B. 7.0 L C. 2.5 L D. 3.5 L
Mathematics
Round the decimal to the given place value.1.72, nearest tenth
A. 1.72 B. 1.7 C. 1.6 D. 1.8
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Decide whether the statement is true or false.{10, 11, 2} ? ? = {10, 11, 2}
A. True B. False
Mathematics