- How can i find the equivalence classes if x-y divsible by 4 is an equivalence relation?

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The common word for bacteria which are helically curved rods is? Write the equation of a line that is perpendicular to y= -1 and that passes through the point (8, -4)? Forgot to write down my observations but for all those chemists out there, what is the color of a 0.1 M K2C2O4 solution? For the curve given by r(t)=⟨7t,3t,1+4t2⟩
Find the curvature at t=1
k(t)=? ,? (x^4) + (ax^3) + (bx) + c divided by (x-1) and (x+1) and (x+2) the remainders are 14, 0, -16. Find values of a, b, c?