book Maths Puzzle Numerical Ability

Graph the solution of the system of linear inequalities
2x+y>or equal to 4
x-1>0

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book Other Question

Lorraine has $7.70 in dimes and quarter. If the number of quarters is two more than twice the number of dimes, how many of each type does she have? Can you help me factor the polynomial 8a^3b+12a^2b^2-4a^2b