exam Maths Puzzle Numerical Ability

solve{{{343x^3=1}}} (there are 3 solutions one real and 2 complex)

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exam Other Question

determine if the following problem is rational or irrational. sqrt(625) please help My Problem is to find the slope and y intercept for x= -7. Should my answer be;
1.)Slope:0; y-intercept;none or 2)Slope: undefined; y-intercept:none? I want to say that the answer