Please help me with this Math problem
8!/5!3!​

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Give me the equations of two lines that have the same slope but are not parallel.

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