Answer: M=matts age
Persons age= 2m+7
Step-by-step explanation:I am assuming you mean write an equation
How many four element subsets of \{1, 2, 3, 4, 5, 6, 7\}{1,2,3,4,5,6,7} have 11 as an element but do not have 77 as an element
levacccp [35]
If we fix 1 to be an element of a subset of size 4, then we can choose from 5 other elements (2, 3, 4, 5, and 6) to fill the other 3 spots in the subset. So there are
such subsets.
Answer:
Step-by-step explanation:
5
Answer:
(x + 5)² + (y - 7)² = 13
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
Here (h, k) = (- 5, 7) and r = 
, thus
(x - (- 5))² + (y - 7)² = ( )² , that is
(x + 5)² + (y - 7)² = 13 ← equation of circle
Calculate the volume, that is easy:
<span>4 x 5 x 2.5 = 50m3 </span>
<span>now, as you did not provided if you use nitrogen in </span>
<span>ntp (normal temperature and pressure - 20c, 1atm) weight is 1.165kg/m3 </span>
<span>or: </span>
<span>stp (standard temperature and pressure - 0c, 1atm) weight is 1.2506 </span>
<span>these are in case of pure nitrogen, as in presented case nitrogen is only 79% we need to change weights to represent that: </span>
<span>ntp - 1.165kg/m3 / 100% x 79% = 0.92035kg/m3 </span>
<span>stp - 1.2506kg/m3 / 100% x 79% = 0.987974kg/m3 </span>
<span>therefore in case of: </span>
<span>ntp, total weight of n2 will be 50m3 x 0.92035kg/m3 = 46.0175kg </span>
<span>stp, total weight of n2 will be 50m3 x 0.987974kg/m3 = 49.3987kg</span>
