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18 May 2007, 16:53
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During a five day period, monday through friday, the average was 86 degrees. what was the high temperature on Friday?
(2) The high temperature on Friday reduced the average high temperature for the week by 1 degree.
can someone elaborate on how (2) allows us to determine the temperature on Friday?
(2) The high temperature on Friday reduced the average high temperature for the week by 1 degree.
can someone elaborate on how (2) allows us to determine the temperature on Friday?
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18 May 2007, 20:33
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bmwhype2
M = temp on Monday
T1 = temp on Tues
....
T2 = temp on Thursday
F = temp on Fri
(M + T 1 + W + T2 + F) = 86 * 5 = 430
"The high temperature on Friday reduced the average high temperature for the week by 1 degree" means that without Fri, the average temp is 87
=> (M + T1 + W + T2) = 87 * 4 = 348
=> F = 430 - 348 = 82
18 May 2007, 20:57
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bmwhype2
i am supposing that average high tempreture for the week, 5 days, is 86.
if 86 is reduced to 85, then fridays tempreture, everything holding the same, should be reduced by 5 to 81.
