The expression for the angle m∠RST from the given bisctor is; 6x - 18
How to find the expression for a given angle?
From the given image in the attachment we are given that;
SQ bisects ∠TSR
m ∠RSQ = 3x - 9
Now, since SQ is a bisector of ∠TSR, we can say that
m∠RST = 2 * m∠RSQ
Thus angle RST is expressed as;
m∠RST = 2(3x - 9)
m∠RST = 6x - 18
Read more about Angle expression at; https://brainly.com/question/16953095
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