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LilVeroDez13
Group Title
Suppose B is the midpoint of AC. AB = 5x and BC = 3x + 4. Find AB. (Hint: Make a sketch and write an equation to solve.)
 2 years ago
 2 years ago
LilVeroDez13 Group Title
Suppose B is the midpoint of AC. AB = 5x and BC = 3x + 4. Find AB. (Hint: Make a sketch and write an equation to solve.)
 2 years ago
 2 years ago

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jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
B is the midpoint, so AB and BC are equal pieces that make up AC
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
this means AB = BC 5x = 3x+4
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
So then i would solve for x?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
yes you would
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
tell me what you get
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
I get .5.. but i know thats wrong.. so, 5x = 3x + 4.. u combine like terms.. right?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
subtract 3x from both sides
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
5x = 3x + 4 5x3x = 3x + 43x 2x = 4
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
whats next?
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
divide 2 do both sides.. x = 2
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
exactly, now use this to find AB
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
5(2) = 10 :)
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you nailed it
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
Thanks!! :) Can u help me with another question
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
sure
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
Thanks!! :)) Four points A, B, C, and D are coplanar, but only two at a time are collinear. Suppose a line is drawn through each pair of points. How many lines can you draw?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
Four points A, B, C, and D are coplanar means that all four points lie in the same plane
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
but only two at a time are collinear means that all 4 points do NOT form a straight line also, it means that there are no 3 points that form a straight line
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
so we might have something like this dw:1348964739339:dw
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
Here are two pairs of lines dw:1348964798916:dw
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
oops just meant to say "here are a pair of lines"
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
Here's another pair dw:1348964855161:dw
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
and another pair dw:1348964897439:dw
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
and that's all we can draw because there are no other possible pairs of lines to draw
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
:) So, there are 4 possible ways?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
double that to get 8
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
4 pairs of lines = 8 lines
 2 years ago

LilVeroDez13 Group TitleBest ResponseYou've already chosen the best response.1
Ahh.. i see now. Thanks so much!! ur really smart :) geometry kicks my butt. You make it easy to understand :)
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
oh wait, i'm counting 3 pairs (not sure where I got 4 pairs) so 3 pairs = 6 lines
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
I'm glad I do
 2 years ago
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