Given the figure below, solve for x:

Which of these choices show a pair of equivalent expressions?

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

Find the solution of this system of equation -7x+y=-20 9x-3y=36