exam Maths Puzzle Numerical Ability

Solve the system by addition. -3x - 4y = -2
x + 3y = -6

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exam Other Question

the total area of six faces of a cube is 240 cm^2 how long to the nearest 10th is one egde Bob owns a watch repair shop. He has found that the cost of operating his shop is given by c(x)=4x^2-304x+71, where x is the number of watches repaired. How many watches must her repair to have the lowest cost?

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