Solve.
{ 2d+e=8
{d-e-4
use the linear combination method.

there are infinitely many solutions.

there is no solution.

the solution is (4, 0).

the solution is (5, - 2).

What is the upper quartile in the box plot?

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?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?