exam Maths Puzzle Numerical Ability

Alex and Boy working together can complete a job in 7 12 hours. Working alone, Alex takes 8 hours longer than Boy to do the job. How long would it take each working alone?helllpp me...

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exam Other Question

for the inequality 2x+3y>6
what is
1. slope
2. direction of the line (rise or fall left to right)
3. dotted or solid line
4. shading above or below the line For moving purposes, the Hendersons bought 25 card board boxes for $97.50. There were two kinds of boxes; the large ones cost $ 7.50 per box, and the small ones cost $3 per box. HOw many boxes of each kind did they buy?