The miniature gold scores for 7 friends are 23, 30, 32, 35, 14, and 23. What is the mean golf score for this group of friends ?
1 answer:
If you add them all together, you'd get 157. Then you divide by 7 and you'd get 31.4
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67.98,68.11, 68.6
The value of the coefficient B is 9.
2(x+By)(x-2y)
=2(x^2 -2xy +Bxy -2By^2)
=2x^2 -4xy + 2Bxy - 4By^2
The original form is 2x^2 + 14xy - 36y^2
-36y^2 = -4By^2
B= 9
-4xy +2Bxy= 14xy
xy(-4 +2B)= 14xy
-4 + 2B = 14
2B = 18
B=9
