exam Maths Puzzle Numerical Ability

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The line y=0.15x + 0.70 represents an estimate of the average cost of gasoline for each year. The line 0.11x - y = -0.85 estimates the price of gasoline in Ja

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Multiply
-3a^2b over 35a^5 times 14a^3b^2 over -9b^4 Make a conjecture about the relationship between the original number and the final number in the following process.
Pick a number
Multiply the number by 12
Add 12 to the prod