What is the absolute value of square root of -15

15i because the square root of a negative number is always imaginary and the absolute value comes in after the equation. If you want the square root of 15, or the square root of the absolute value of -15, it should be fine to write the square root of 15.

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8