6(x+2)=5(x+7) please help me is urgent

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

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%