Answer:
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A relatively large correlation coefficient, such as the 0.87 given here, indicates a direct proportion relationship between two variables. Here, as baby gains weight, smart phone pricing increases. Note that this is NOT a causal relationship.
The answer is C
4(3-x)+6x=3x+12-x All real numbers are solutions.
100 is the correct answer to your question
2.5*7 = 17.5. If it's easier for you, multiply 2.5 by 5 then add 2.5*2.
