exam Maths Puzzle Numerical Ability

Solve the equation:
3x^2 + 15X + 18 = 0

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exam Other Question

A guide dog training center took 1/2 of the puppies at the dog pound. Steve took 1/2 of the remaining. Tanya took the 5 that were left. How many puppies were there to begin with? Thanks for helping me! Word problem:

Assume that the sales of a certain appliance dealer are approximated by a linear function. Suppose that were $80000 in 1982 and $58000 in 1987. Let x=0 represent