Average height for the week = (30.84 + 30.18) / 2 = 30.51 inches
Height on Sunday = (30.51 x 7) - (30.18 x 6) = 31.22 inches
The average height of a barometer during one week was 30.84 inches. For six weeks days of the same week the average height was 30.18 inches. What was the height on Sunday?
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What ever do it yourself and I will know if you did it yourself or else I will hack you and I am not joking.
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