Find the sum and express it in simplest form (4s^3 - 9s^2 - 7 ) + ( 2s^3 + 5s^2 - 2 )

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab

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?

Are the corresponding angles congruent? explain why or why not.