Answer:
21 : 8
Step-by-step explanation:
A:B=3:4
A/B = 3/4
A = 3/4 B..... (1)
B:C =7:2
B/C = 7/2
B = 7/2 C.... (2)
From equations (1) & (2)

Answer:
b+1/3
Step-by-step explanation:
You don't know what "b" is so its just b +1/3
Answer:
270 pounds
Step-by-step explanation:
half of 12 is 6, so 18. Then you take half of 180 and add to 180
Answer:
12
Step-by-step explanation:
Answer:
I think its Symmetric Property.
Step-by-step explanation: