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anonymous
 4 years ago
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.)
anonymous
 4 years ago
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.)

This Question is Closed

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

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

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So then i would solve for x?

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1tell me what you get

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I get .5.. but i know thats wrong.. so, 5x = 3x + 4.. u combine like terms.. right?

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1subtract 3x from both sides

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.15x = 3x + 4 5x3x = 3x + 43x 2x = 4

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0divide 2 do both sides.. x = 2

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

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Thanks!! :) Can u help me with another question

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Thanks!! :)) 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?

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

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1but 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

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

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

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

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

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1and another pair dw:1348964897439:dw

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

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0:) So, there are 4 possible ways?

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1double that to get 8

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.14 pairs of lines = 8 lines

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Ahh.. i see now. Thanks so much!! ur really smart :) geometry kicks my butt. You make it easy to understand :)

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