Why does it takes 3 copies of 1/6 to show the same amount as 1copy of 1 / 2

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

For the equations below which statement is true ? -2x=14 6x=-42

Mr. vector door is buying two new cowboy hats all together the hats cost $75.12 the second heart cost twice as much as the first hat what is the price of the more expensive at round to the nearest hundredth