2.5 because if you move x to the other side of the equation you will get y=2.5x, and the constant of proportionality is what x is multiplied by, in this case, it's 2.5.
1,800 is your answer because 1,200/72=16.6666667 and 1,800/108=16.6666667.
Hoped I helped!
Hello!
Distributive property: a(b+c)=ab+ac


Minus and plus sign.

Then multiply by the numbers.


Hope this helps!
Thanks!
Have a great day!
Answer:
9r
Step-by-step explanation:
1.5r - 3r + 10.5r
10.5r + 1.5r = 12r
12r - 3r = 9r
Final Answer = 9r