Question

2. Find the value of x. The diagram is not to scale. Given: RS = ST, mRST = 7x - 54, mSTU = 8x. (1 point)

Answer 1

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...

Answer 2

so it would be 16?

Answer 3

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

Answer 4

awhh ok