Answer:
sqrt3[sqrt3+2sqrt12]=sqrt3[sqrt3+4sqrt3] = sqrt3[5sqrt3= 3x5 =15
We add up all those numbers (excluding 30) and divide by the number of numbers (9). This results in 78.8 (round up to 79).
79-74 = 5. So the mean has increased by 5 points. (C)
The number is 24. If 8 is one third of the number, you multiply 8 by 3 to find the number, which is 24.
Answer:
Negative 8 over 5 comma negative 6 over 5