book Maths Puzzle Numerical Ability

a merchant wants to mix gummy worms worth $3 per pound and gummy bears worth $1.50 per pound to make 30 pounds of amixture worth $2.10 per pound. How many pounds of each type of ca

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Sue has $3.50 of dimes and nickels. If she has 50 coins, how many of each type of coin does she have? the line 2x + 3y=1 intersects the curve x(x+y)=10 at a and b. calculate the coordinates of a and b.