The equivalent expression is 4x + 20
Let's say that ground level is 0. When she goes down to the basement, she is going -12 feet since each flight of stairs is12 feet. Then she goes up 12 more feet= -12+12=0. She is back at ground level. Then she goes up another 12 feet= 0+12= 12. So I believe the answer is 12 feet.
Ur answer is B............!!!!!!
Hope its right!!
Answer:
going upp then downn
Step-by-step explanation:
