What is the square root of negative one

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

X+y=-4 x-y=2 use elimination with adding and subtraction

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d? are he re