What is the exact value for the expression the square root of 189. − the square root of 21. + the square root of 84.? simplify if possible. the square root of 21. 6 the square root of 7. 4 the square root of 21. 24 the square root of 7.

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%

Acompound inequality is graphed, and its graph consists of all real numbers. which open scentence could have resulted in this solution set r> 3 or r< -2. r< 3 or r< -2. r> 3 or r> -2. r< 3 or r> -2 plz asap

Marco states that 7.696696669…… is a rational number because it is a repeating decimal. is he correct? justify your answer.