Explain why two problems have the same answer 800,000

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?