Yes they should be if not you would only need to modify it slightly.
70 + 66 = 136
66 goes into 70 1.06060606 times
70-4n = 66
3X - 4 = 66 add 4 to each side 3X - 4 + 4 = 66 + 4 3X = 70 divide each sides integers by 3 (3/3)X = 70/3 X = 70/3 ------------------check in original equation 3(70/3) - 4 = 66 210/3 - 4 = 66 70 - 4 = 66 66 = 66 ---------------checks ( naturally, you could have canceled here, 3(70/3) and just got 70 )
70
The greatest common factor of 70 , 66 = 2
70
The mean is (65 + 66 + 70 + 61)/4 = 262/4 = 65.5The mean is (65 + 66 + 70 + 61)/4 = 262/4 = 65.5The mean is (65 + 66 + 70 + 61)/4 = 262/4 = 65.5The mean is (65 + 66 + 70 + 61)/4 = 262/4 = 65.5
-4+70=66
To the nearest ten = 70 To the nearest 100 = 100
The range is 72 minus 66 = 6
66 + 66 =132