Answer: Mrs. Jefferson should plan to spend 119.1 on wallpaper
Step-by-step explanation:
She would like to wallpaper everything but the door. It means that the area to be covered by the wallpaper would be the area of the 4 walls of the room - the area of the door.
The room is 18ft in length and 12ft in width. Thea area of each side of the room is
18 × 12 = 216 square feet
Area of the 4 sides of the room is
216 × 4 = 864 square feet
The door is 7ft in width and 3 ft in length. Area of door is
7 × 3 = 21 square feet
Area to be covered is
864 - 21 = 843 square feet
Each roll of wallpaper covers approximately 160 square ft. Therefore, the number of rolls needed is
843/160 = 5.26
Since the rolls cannot be a fraction, then she needs 6 rolls
Since a roll costs 19.85, the cost of 6 rolls is
19.85 × 6 = 119.1
Explanation
where x is the number of days since the start of the job
and f(x) is the rate of change
Step 1
a)find the total expenditure if the job takes 12 days
so, as x represents the number of days, just replace and calculate
let x= 12
so
a) 51.1
Step 2
now, let's find the total spent on the job from the 10 to 20th day
a) find the x value ( number of days since the job started)
x= 20 days-10dys= 10
so
x= 10
3 (2x + 1) = 21
6x + 3= 21
-3 -3
6x = 18
Divide each side by 6, and x equals 3.
3 (2(3) + 1) = 21
3 (6 + 1) = 21
18 + 3 = 21
Hope this helps! Can I please have brainliest so I can level up? Thank you!
Answer:
x= -10 ; y= 3
Step-by-step explanation:
see the picture
