exam Maths Puzzle Numerical Ability

y=x^2+2

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exam Other Question

2[5(w+3)-(w+1)]=3(1+w) please help me solve.

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CJ Brandon goes on a ACaub Scout hike and hikes to a waterfall in 3 hours and hikes back along the same route to the compground in 2 hours. If the hiking rate is 1mph faster returning than going, how fast are the boys hiking each way?