What is the greatest possible integer value of x for which square root of √x-5 is an imaginary number

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

Y+ 2/y is it a polynomial in one variable or not? and if so, why?