How many permutations of a 7-digit phone number exist, assuming that numbers may be repeated and any number 0-9 may be used for any digit? A10 to the 7th power
B10!/3\!
C10!
D70

7x+8y=-18, 4x-9y=-3 solve the system of equations

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%