Which statements describe the modern system of classification? Check all that apply.

1: -9 - 4

2: 9 - 4

3: -9 + 4

4: 9+ (-4)

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

40 describe the outliers from the scatter plot.

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?