Respuesta :
Answer:
39
Step-by-step explanation:
12x7=84 which is the area
So now add 45 up until it gets to 84
46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 70, 80, 81, 82, 83, 84
Count it all up and the answer is 39
The number of one-foot square tiles does Mrs. Peterson need to completely cover the kitchen floor is 39.
What is the area of a rectangle?
Area of rectangle is the product of the length of the rectangle and the width of the rectangle. It can be given as,
A=a\times b
Here, (a)is the length rectangle and (b) is the width of the rectangle
Mrs. Peterson wants to replace all the floor tiles in her kitchen. The kitchen floor is,
- 12 feet long,
- 7 feet wide.
The area of this rectangular kitchen floor is,
[tex]A=12\times7\\A=84\rm\;ft^2[/tex]
The area of the floor is 84 foot squared. Ms. Peterson already has 45 one-foot square tiles. The area of 45 one-foot square tiles will be 45 foot squared.
Thus, the number of one-foot square tiles does she need to completely cover the kitchen floor are,
[tex]n=84-45\\n=39[/tex]
The number of one-foot square tiles does Mrs. Peterson need to completely cover the kitchen floor is 39.
Learn more about the area of rectangle here;
https://brainly.com/question/11202023
