If m(6,9) is the midpoint of the line segment ab, and if a has coordinates (3,5), find the coordinates of b.
a). (-7,-12)
b). (9,-13)
c). (-5,-5)
d). (9,13)
e). (-9,13)

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Select the correct answer and solve for y