Given that a square patio of at least 80 square feet is to be built from 125 tiles of length 12 inches or 1 feet.
Part A;
Since there are 125 tiles and the patio has a shape of a square of at least 80 square feet, then the possible dimensions of the patio are
9 ft by 9 ft = 81 ft
10 ft by 10 ft = 100 ft, and
11 ft by 11 ft = 121 ft.
Part B.
For a patio of dimensions, 9ft by 9ft, the number of tiles that will not be used is given by 125 - 81 = 44
For a patio of dimensions, 10ft by 10ft, the number of tiles that will not be used is given by 125 - 100 = 25
For a patio of dimensions, 11ft by 11ft, the number of tiles that will not be used is given by 125 - 121 = 4
-3(y+2)2-5+6y
Steps
Multiply the numbers: 3 x 2 = 6
= -6(y + 2) - 5 + 6y
Then, expand - 6(y + 2): -6y - 12
= -6y - 12-5 + 6y
Simplify
-6y - 12 - 5 + 6y
= -17
Mayumi takes 8 hours. Edwin takes 9 hours. Edwin takes more time by an hour.
The first equation would be 5+6(8).
The next step is to multiply the 6 and the 8, making it 48.
The final step is to add 5 and 48, making your answer 53.
Hope this helps.
