I need help with this math problem thx

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.

Plzzz i beg u so much asap ! what is the slope of this line? enter your answer in the box.

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11