Final answer:
Casper, Laramie, and Gillette are cities in the state of Wyoming, with Casper known for its oil history, Laramie for the University of Wyoming, and Gillette for its energy resources.
Step-by-step explanation:
The state that has Casper, Laramie, and Gillette is Wyoming. These cities are some of the most populous in the state. Casper is located in the east-central part of the state and is known for its history in the oil boom.
Laramie is situated in the southeastern part of Wyoming and is home to the University of Wyoming. Gillette, often called the "Energy Capital of the Nation," is situated in the northeast part of the state and is known for its coal, oil, and methane gas production.