Mathematics
7 Online
OpenStudy (anonymous):
#7 Please Find the value of x
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OpenStudy (anonymous):
OpenStudy (anonymous):
2x+x+15+90=180 just solve for x
OpenStudy (anonymous):
You really can just say this.
\[2x + x + 15 = 90\]Can you solve this @Trexy ?
OpenStudy (anonymous):
37.5? @Calcmathlete
OpenStudy (anonymous):
x=25
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OpenStudy (anonymous):
\[2x + x + 15 = 90 \implies 3x + 15 = 90 \implies 3x = 75 \implies x = \frac{75}{3} \implies x = ?\]
OpenStudy (anonymous):
HOW DID YOU GET THAT.. lol.. im really not good at geometry..
OpenStudy (anonymous):
Well thats explain better..
OpenStudy (anonymous):
lol...this is algebra though XD
OpenStudy (anonymous):
no.. this is geometry Cal..
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OpenStudy (anonymous):
The overall question is geometry...the solving for x part is algebra...
OpenStudy (anonymous):
OpenStudy (anonymous):
i know i have to add this by 180, but how?
OpenStudy (anonymous):
Ok. There is a theorem that says that isosceles triangles have congruent base angles. Therefore: 2y + 40 = 180 Can you solve?
OpenStudy (anonymous):
70?
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OpenStudy (anonymous):
Yup.
|dw:1343018042020:dw|
Remember, supplementary angles add up to 180.
x + 70 = 180
OpenStudy (anonymous):
Can you solve for x here?
OpenStudy (anonymous):
110? so 110 is right answer?
OpenStudy (anonymous):
Yes :)
OpenStudy (anonymous):
thanks
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OpenStudy (anonymous):
np :)