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OpenStudy (anonymous):
2. Find the value of x. The diagram is not to scale. Given: RS = ST, mRST = 7x - 54, mSTU = 8x. (1 point)
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OpenStudy (anonymous):
OpenStudy (raden):
mSTR + mSTU = 180 (supplementary angles) mSTR + 8x = 180 mSTR = 180-8x because ST = ST, so the measure of SRT = measure of STR = 180-8x noe, the sum of all angles in triangle = 180, so mSTR + mSRT + mRST = 180 180-x + 180-x + 7x-54 = 180 solve for x, good luck...
OpenStudy (anonymous):
so it would be 16?
OpenStudy (raden):
sorry, there typo from me above... it should be 180-8x + 180-8x + 7x-54 = 180 simplied be, -9x + 126 = 0 or -9x = -126 x = -126/-9 = 14
OpenStudy (anonymous):
awhh ok
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