.723 is the percentage change, just move the decimal over 2 places. 72.3%
<h3>
Answer:</h3>
A.
+-5x+14x+-35
+9x-35
B. 

C. 

D. 


Step-by-step explanation:
A. (3x*2x)+(3x*-5)+(7*2x)+(7*-5)
Multiply and simplify.
+9x-35
B. (
)+(
-3x)+(2x
)+(2x
)
Multiply and simplify.

C. 
Multiply and simplify.

D. 
Multiply and simplify.

I hope this helps!
But you should really do this yourself.
If y = 2x, then y/x = 2. The constant of proportionality is 2.
Answer:
27/10, or 2 7/10 kg
Step-by-step explanation:
We first have the expression 15/100*18, which simplifies to 3/20*18. If we multiply and simplify, we get 27/10, or 2 7/10
Is there a picture of some sort of angle or parallelogram? Because there isn't enough information to solve the question with only this. Sorry!