Answer:
9x - 10y =75
Step-by-step explanation:
C/3 = 6 1/7
Multiply 3 to both sides:
C = 6 1/7 * 3
Convert 6 1/7 into an improper fraction:
C = 43/7 * 3
Multiply 3 to the numerator:
C = 129/7
Convert back into a mixed number:
C = 18 3/7
Answer:±2 and±9
Step-by-step explanation:
±√(4) = ±2
±√(81) = ±9
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