then answer has to be 9 1/4 i hope this was !
she lost 20% of her body weight
this simplifies down to 8/10, meaning that she lost 2/10ths of her weight, or 20%
subtract 1.88 from each side
8-1.88 = 1.88-1.88+a
6.12 = a
8 = 1.88+a
8 = 1.88+6.12
be careful with finding its inverse! an inverse only exists for one-to-one functions so we need to restrict the domain such that the quadratic is one-to-one. for brevity, we'll take the domain: but you could just as easily take .
being that the quadratic is now one-to-one, we'll try to find its inverse.
by definition, an inverse function is the function flipped across the line y = x. so being that, we need to interchange the x and y coordinates around and then solve for y.
this gives us:
now, this function is defined for when and .
so i'll end with this, what is the relationship between the domain/range of the original function and the domain/range of the inverse?