Help meh for the maths

Which expression will have the same sum as 3_8 + 1/4?

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

Explain why the factor 1.5 is broke. into two numbers in the model.