Add the following 3l²mn-lm²n+2lm²n+lmn²+-3lmn²+2l²mn< br />pls don't spam​

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

Which of the choices shown could be used to prove that aacp=abcp ?

What is the value of x in the this question ?