In your own words, explain what two-dimensional (2-D)
and three dimensional (3-D)
models are. Give an example
of one you've seen recently.

a 2d is basically something that is flat, or like a graph. it doesnt have a volume.

a 3d is something that has a volume, it has sides and front and back.

2d ex; a graph on paper

3d ex; a square or rectangular box

Step-by-step explanation:

hope it helps

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x