The legs of an isosceles triangle have lengths of 2x+4 and -x+16. The base has a length of 3x+2. What is the length of the base?
a.14
c.12
b.4
d.cannot be determined
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OpenStudy (anonymous):
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OpenStudy (anonymous):
2x+4=-x+16 would it be like this?
ganeshie8 (ganeshie8):
yup ! legs are congruent
ganeshie8 (ganeshie8):
keep going
OpenStudy (anonymous):
but what do you do after that?
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OpenStudy (anonymous):
ohhhh, solve for x. nvm. thx! x=4
ganeshie8 (ganeshie8):
but we're not after x
OpenStudy (anonymous):
oh?
ganeshie8 (ganeshie8):
|dw:1379285702960:dw|
ganeshie8 (ganeshie8):
question is asking us to find base length
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ganeshie8 (ganeshie8):
|dw:1379285761666:dw|
OpenStudy (anonymous):
3x+2=4x then solve for x?
OpenStudy (anonymous):
i got x=2 so i must be wrong. :/
ganeshie8 (ganeshie8):
you've already solved x = 4
OpenStudy (anonymous):
yep
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ganeshie8 (ganeshie8):
since base = 3x+2,
to find its length measure, simply plugin x = 4
base = 3(4) + 2
ganeshie8 (ganeshie8):
simpliofy
OpenStudy (anonymous):
14
OpenStudy (anonymous):
dang that was my first answer that i got!
OpenStudy (anonymous):
:/
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ganeshie8 (ganeshie8):
shud trust ur instincts :)
OpenStudy (anonymous):
haha.......Nope. (-: my insticts are usually wrong!