Answer:
e = 1/2
Step-by-step explanation:

multiply both sides by 2

Answer:
reflection across the y axis
Answer:

Step-by-step explanation:
we know that
In the right triangle PQR
----> by TOA (opposite side divided by adjacent side)
substitute the given values

using a calculator

Answer:
4
Step-by-step explanation:
a=3
b=1
c=-1
(b + c) - (c-a)
(1+(-1))-((-1)-(3))
Note
+*-= -
+*+=+
-*-=+
So
(1-1)-(-1-3)
0-(-4)
4