Step-by-step explanation:
First, let's distribute the terms outside each parentheses to get rid of them:
Next, let's move the terms with an 
variable to the left side of the equation, and everything else to the right side:
Answer:
awnser is 36
Step-by-step explanation:
Answer:
- a) NTRD standard price = $26.30
- b) range: $11.20 to $33.00, a range of $21.80
Step-by-step explanation:
a) The average is the sum divided by the number of contributors. Let n represent the standard price at Night-Time Rest Days. Then ...
... ($22.45 +18.55 +24.50 +11.20 +n)/5 = $20.60
... 76.70 + n = 103.00 . . . . multiply by 5 and collect terms
... n = $26.30 . . . . standard price at NTRD
b) The lowest standard price is $11.20. The highest breakfast price is $33.00. The range is the difference between these ...
... $33.00 -11.20 = $21.80 . . . . range in cost for a single night
You can just pick any 5 digit decimal and multiply it with any 4 digit decimal to check.
You will see that it has 9 digits after the decimal.
