PLEASE HELP. identify the numbers that make each statement true you may select more than one number for each statement

1a. -4.8+? = a positive number

1b. ?-11/2=a negative number

__-5.2

__4.9

__3/2

__-7/3

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

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%