You can find this using the distance formula.
d = \(\sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}\) Plug your coordinates into the formula
d = \(\sqrt{(29 - 43)^2 + (-3 -(-15))^2}\) Simplify the double negative
d = \(\sqrt{(29 - 43)^2 + (-3 + 15)^2}\) Subtract and Add inside the parentheses
d = \(\sqrt{(-14)^2 + (12)^2}\) Simplify the exponents
d = \(\sqrt{196 + 144}\) Add
d = \(\sqrt{340}\)
d ≈ 18.493