Answer:
yes
number of tiles needed = (200 x 200) / (30 x 30) = 44.4
Step-by-step explanation:
number of tiles needed = Area of comfort room / area of tiles
Area of a square = length²
convert area of comfort room to cm
100 cm = 1 meter
2 x 100 = 200
number of tiles needed = (200 x 200) / (30 x 30) = 44.4
50 tiles are more than enough to tile the room
Answer:
where are the numbers tell me and ill edit my answer again
Step-by-step explanation:
The answer is 35 batteries. The batteries are the conductors we need to stay alive and make things work
Answer:
16x² − 56x + 49
Step-by-step explanation:
The square of difference of two terms can be expressed as a perfect square trinomial in the following manner:
![(a-b)^{2}=a^{2}-2ab+b^{2}](https://tex.z-dn.net/?f=%28a-b%29%5E%7B2%7D%3Da%5E%7B2%7D-2ab%2Bb%5E%7B2%7D)
The symbol with square terms must be always positive. So this removes the first two options from the given choices. The correct option is either c or d.
Only the option d can be expressed as a perfect square as shown below:
![16x^{2}-56x+49\\\\ = (4x)^{2}-2(4x)(7)+(7)^{2}\\\\ =(4x - 7)^{2}](https://tex.z-dn.net/?f=16x%5E%7B2%7D-56x%2B49%5C%5C%5C%5C%20%3D%20%284x%29%5E%7B2%7D-2%284x%29%287%29%2B%287%29%5E%7B2%7D%5C%5C%5C%5C%20%3D%284x%20-%207%29%5E%7B2%7D)
Option c would have been correct if it was -30b instead of -15b i.e. the middle term is twice the product of first and second term.
So, option D is correct