Chapter 9 Quadratic Relations and Conic Sections - 9.1 Apply the Distance and Midpoint Formulas - 9.1 Exercises - Skill Practice - Page 617: 16

$$\left(1.9,\:\frac{13}{2}\right)$$

Using the distance formula, we find: $$\sqrt{\left(2.3-1.5\right)^2+\left(9-4\right)^2}\\ 5.06$$ Using the midpoint formula, we find: $$\left(\frac{2.3+1.5}{2},\:\frac{9+4}{2}\right)\\ \left(1.9,\:\frac{13}{2}\right)$$