Answer:
D) n+12
Step-by-step explanation:
Answer: the width of the room is 15 feet less than the length of the room
Step-by-step explanation:
x lbs * 5.5 + 100 lbs * 6.25 = (x+100) * 6.00
distribute
5.5x + 625 = 6x+600
subtract 5.5 x from each side
625 = .5x +600
subtract 600 from each side
25 = .5x
divide each side by .5
x = 100
You need 100 pounds of the 5.50 mix
There are 50 states in the U.S. so to find the states that don't have a store operator by company A you must subtract the states that do by the total number of states:
50 - 38 = 12
12 stores do not have a store operator by company A
To find the fraction you must do 
Part is the number of states that don't have a store operator by company A
Whole is the total number of states in the U.S.
You get the fraction:

^^^This fraction can be simplified to...

Hope this helped!
~Just a girl in love with Shawn Mendes