Please can somebody help me

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

On a architect's drawing of a house, 1 inche representa 1.5

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?