Account balance is not proportional to the number of weeks.
Replace X with 3 and simplify. The answer you would get is 11.
Answer:
The number of 3-digit phone prefixes that do not start with 0 or 1, but contain 0 or 1 as the middle digit is 160.
Step-by-step explanation:
The phone prefix for any area is of the form <u>X</u> <u>X</u> <u>X</u>.
These prefixes can take values from 0 to 9.
The condition to create a phone prefix is:
- The first digit cannot be 0 or 1
- The middle digit is either 0 or 1.
The possible number of ways to fill the first place is 8 since 0 or 1 cannot be the first digit.
The possible number of ways to fill the second place is 2 since the middle digit can be occupied by either 0 or 1.
The possible number of ways to fill the last place is 10 since there are no condition applied to the last digit.
Then the number of phone prefixes that can be formed is = 
Thus, the possible number of phone prefixes possible is 160.
Answer:
Cost of new carpet per square foot should be less than or equal to $3.54.
Step-by-step explanation:
Given:
Money have to buy carpet = 
dimension of game room is 20 feet by 12 feet
So we can say length l = 20 feet
and width w = 12 feet
let
be the cost per square foot for new carpet.
Assuming game room to be rectangular in shape we will find the area of it.
Area of room = 
Total area
cost per square feet ≤ Total money we have
Hence,

Hence Cost of new carpet per square foot should be less than or equal to $3.54.