Fast! no guessing! explain how u got the answer! make sure its 100% right! thx in advanced

A)  75, 77, 78, 81, 83, 86, 92, 94, 98, 106

Explanation : Basically, you just take the number on the right, and add it to the number to the left.

b)  Remember, to find the mean, you must add everything up, and then divide it by how many numbers you added together.

So :

75 + 77 + 78 + 81 + 83 + 86 + 92 + 94 + 98 + 106 = 870

Then, divide 870 by 10, because we added 10 numbers together.

870 ÷ 10 = 87

So, our mean is 87

c)  Remember, to find the MAD, we must subtract the mean from each data point.

So :

75 - 87 = -12

77 - 87 = -10

78 - 87 = -9

81 - 87 = -6

83 - 87 = -4

86 - 87 = -1

92 - 87 = 5

94 - 87 = 7

98 - 87 = 11

106 - 87 = 19

Then, add all of those values up, and find the mean of that.

*Remember, when finding the MAD, everything is a positive.

12 + 10 + 9 + 6 + 4 + 1 + 5 + 7 + 11 + 19 = 84

Divide 84 by 10.

84 ÷ 10 = 8.4

So, our MAD is 8.4

~Hope I helped!~

Ithink is a. true, but not sure

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.