30
Step-by-step explanation: when you add all of the ones in the center up even the ones that aren't complete you get 30.
r(0,90)(x,y) . t(-5,0)
last option
step-by-step explanation:
∆def to ∆d"e"f"
- rotate 90 counterclockwise degrees
- then translated 5 to the left (x --> x - 5)
answer is the last option