exam Maths Puzzle Numerical Ability

identify the center of the circle (x+2)^2+(y-1)^2=9 I got -1,1?

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exam Other Question

square root of 72 plus square root of 18 minus the square root of -18 I am having a hard time with this word problem, can you please help?

A car travels 60 miles in the same time that a car traveling 10 miles per hour faster travels 90 miles. What is the rate of each car?

Thanks a bunch!