What is A= 2/h (a+b) for h?

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%

Find the axis of symmerty for x y=x squared -4x-8