exam Maths Puzzle Numerical Ability

Is the following trinomial a perfect square?
x2 – 4x + 4

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exam Other Question

will you help me with these three problems?

6y+10>8-(y+14)

4.6(x-3.4)>5.1x

-5x-(2x+3)>1 2 cars leave for a destination 48km away. Car B going at a speed of 64km/hr started 12 minutes ahead of Car A which goes at a speed of 100 km/hr. How long will it take Car A to overtake Car B?