To find the mean, you add all of the numbers and divide by how many numbers you added together. 7+2+3+2+1=15. 15/5=3. The mean is 3.
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The distance between (3, 7) and (-3, -1) is sqrt{[(3 - (-3)]2 + [7 - (-1)]2} = sqrt{[3 + 3]2 + [7 + 1]2} =sqrt{[6]2 + [8]2} = sqrt{36 + 64} = sqrt{100} = 10 units.
If you mean: 2/3x -7 = 11 then the value of x works out as 1/27 Check: 2/(3*1/27 -7) = 11
3 1/2 = 7/2 in improper fractionmultiplicative inverse is the reciprocal of 7/2 = 2/7
If you mean: y = 3x-3 and (-2, 1) then it is y = 3x+7
Oh, dude, the reciprocal of a number is just 1 divided by that number. So, the reciprocal of 2 is 1/2, and the reciprocal of 1/3 is 3. So, the reciprocal of 2 and 1/3 is 1/(2 + 1/3) which simplifies to 3/7. Easy peasy, like basic math stuff, you know?