In triangle ABC, D is the centroid and M is the midpoint of segment AC. If BD = 10 and DM = 2x + 1, find MB.
2
9.5
4.5
15
2007-07-20 15:09:36 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
MB = 1.5 * BD = 15
Seems something is wrong with this question, because the role of "x" is not clear.
BTW x=2.
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2007-07-20 15:23:10 · answer #1 · answered by oregfiu 7 · 1⤊ 0⤋
x = 2
in a centroid, the longer median segment to D= 2/3 the measure of the entire median.
therefore 10 = 2/3x = 15 so 10 + 2x+ 1= 15
and 2x+1 = 5 so x = 2
i'm taking geometry :)
2007-07-20 15:23:24 · answer #2 · answered by starcraftruinedmylife 3 · 0⤊ 0⤋
The centroid divides the median in the ratio 2:1
So, 10 = 2 (2x+1)
5=2x+1
x=2
2007-07-20 15:29:20 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Whoa...not sure if this is right or not...may want someone elses's opinion...
2x + 1 = 10 (since D is the centroid I can assume that BD and DM would be the smae length so you can set them equal to each other).
Subtract 1 from both sides:
2x = 9
Divide both sides by 2:
x = 4.5
2007-07-20 15:15:30 · answer #4 · answered by Do Anything and I Love Ya! 3 · 0⤊ 1⤋
detect the answer to the questions: what proportion unusual 3 digit numbers have digits that upload mutually to equivalent 5? in ordinary terms 2 113 131 All 3 digit would desire to be below 5 and additionally unusual integer. The unusual integers that are below 5 are a million and 3. ----------------------------- what proportion even 3 digit numbers are greater advantageous than seven-hundred, with digit totals of 11? None because of the fact the sum of even integers can't be the unusual extensive kind yet 11 is unusual.
2016-12-14 14:52:59 · answer #5 · answered by ? 4 · 0⤊ 0⤋
9.5
2007-07-20 15:16:35 · answer #6 · answered by **PiNoY YFC** 7 · 0⤊ 1⤋