Samsung is expanding its lineup of tablet computers and making them look more like its Galaxy smart phones, as it hopes to translate its success in phones to the tablet market, where Apple is dominant, the Associated Press reports. Samsung Electronics Co., the second-largest maker of tablets after Apple, said it is putting three new tablets in the Galaxy Tab 3 series on sale in the U.S. on July 7. The cheapest, a $199 device, will have a screen that measures 7 inches diagonally. An 8-inch model will go for $299 and a 10-inch one for $399…