Answer:
15 2⁄9
Explanation:
1999 to 1990 → 9-year lifespan
137 = −412 + 549
15 2⁄9 = 137⁄9
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x + 10
Step-by-step explanation:
41=5x+17-3x
41=5x-3x+17
41=2x+17
41-21=2x
2x=20
Hence,value of x=10
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the correct answer is D 175