Ajacket cost £70 but is reduced by 12% in a sale. what is its new price

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

How can you construct perpendicular lines and prove theorems about perpendicular lines

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?