Google on the word SCALAR. that's the word your looking for
we are given that
both sides are equal
so, their length must be equal


now, we can find other side


now, we can set them equal


now, we can take square both sides

now, we can solve for p




..............Answer
Answer:
-5.5
Step-by-step explanation:
You just need to subtract the two I'm pretty sure
x=-11
we know that
Points A,B,C,and D are collinear and positioned in that order
so
AD=AB+BC+CD -----> by addition segment postulate
we have
AB=2x+30
AD=x=32
substitute the given values and solve for x
x+32 = (2x+43)
Group terms that contain the same variable
2x-x=32-43
x=-11