Answer:I think b
Step-by-step explanation:
Answer:15
Step-by-step explanation:trust me
All you have to do is plug in the value of X in each expression for the sides of the triangle. Then after you figure out the values for the sides of the triangle in feet. Add the sides together to find the perimeter of the triangle.
C) r^2 + 1 because any number squared (positive or negative) will be positive
RSU+UST=RST
78+3x-12=6x+12
3x+66=6x+12
3x=54
x=18
108+12=120
∠RST=120°
