Answer:
in
Step-by-step explanation:
First you must set up an equation. 
Then, you must solve for x. 
Answer: b∈∅
Step-by-step explanation:
0.20a=220
Where 0.20 is the decimal form of 20%
a is the unknown number
0.20a=220
------- -----
0.20 0.20
a=1100
220 is 20% of 1100.
Answer:
57
Step-by-step explanation:
100 - 43 =
57
Answer:
225 cm²
Step-by-step explanation:
The ratio of areas is the square of the scale factor.
area UVW = (5/2)²·area RST = (25/4)(36 cm²) = 225 cm²