Answer: the number must be placed in the box is 9
suppose: the number must be placed in the box is x
have:
5u + 3(4u - 6) = -3u -27 + 20u + x
⇔ 5u + 12u - 18 = -3u - 27 + 20u +x
⇔ 17u + 3u - 20u = -27 + 18 + x
⇔ 0 = x - 9
⇔ x = 9
Step-by-step explanation:
Answer:
25 sheets of plywood will be needed
Step-by-step explanation:
Each sheet of plywood measures 
.
We have to cover the surface of the house, minus the surface of the hole of the stairs.
To know how many sheets will be needed, we divide the surface to be covered by the surface of each sheet
As we can't buy 0,75 of a sheet, we round it up, i.e. we will need 25 sheets of plywood for subflooring.
Answer:
264,666.
Step-by-step explanation:
We have been given that a number has seven digits.
All digits are 6 except the hundred-thousands' digit.
Hundred thousands: 100,000.
The hundred thousand's digit is 2, so its value would be 200,000.
We have been given that thousands's digit is 4, so its value would be:
4 thousands: 4,000
The number with given hundred thousand's and thousands's digit would be 204,000.
Since all digits are 6 except the hundred-thousands' digit, therefore, our number would be 264,666.
A square plus b square = c square
(a square plus 6 square =10 square,a)
