exam Maths Puzzle Numerical Ability

factor, if possible:
5x2(x+y+1)-15x3(x+y+1)

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exam Other Question

│x│ ≥5 (solve and graph)
│4x + 2│≥6 (solve and graph)
│2x-7│>10 (solve and graph) Suppose that x and y vary inversely and x=4 when y=7 Write the function that models the inverse variation

a. y+1.75 b. y= 28/x c. y=11/x d. y=3/x