Does (6, 4) make the equation y = 2x true?

Taking algebra two apex courses and need with these questions

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300