What is x? (7x+1)=(9x-7)

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

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2