exam Maths Puzzle Numerical Ability

(3x-5)squared -1

6 - 6y(sixth power)

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exam Other Question

3x^2+7=31
7n^2-6=15
5x^2-12=5
what does x = In the year 1998, there were -4.57 times 10 to the 7th power- cars in America. The population of America was -2.3 times 10 to the 6th power-. What was the average number of cars per person in America in 1998?
A. 0.5
B. 1.98
C. 5
D. 19.8