Answer: 4.5
Step-by-step explanation: subtract the x values first, so 7-3=4, then subtract the y values, 4-2=2. Then plug these values into the pythagorean theorem and solve for the hypotenuse c.
[tex]a^{2} + b^{2} = c^{2}[/tex]
[tex]4^{2} + 2^{2} = 4.5[/tex]