Answer:
y=-9x+10
Step-by-step explanation:
90x-10y+100
-90x both sides
-10y=-90x+100
-10y both sides
y=-9x+10
first make them into improper fractions 124/15 and 54/15 then subtract so it would be 70/15 then turn it into a mixed number 4 10/15
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>
The tree trunk is a cylinder so we apply that formula:
It is VCylinder = density x pi x radius x height
So the given in our problem is:
Density = 45 lb/ft^3 = 720.8 kg / m³
Radius = 3ft
Height = 10 ft
Insert variables that in our equation:
VCylinder = 720.8 kg / m³ * pi * 3ft² * 10 ft = 5771.26 kgs
Answer:
E
Step-by-step explanation:
-18x + 21 > -15
-18x > -36
x < 2
20x - 13》17
20x》40
x》2
Or is union
Union of x < 2 and x》2 is all real numbers
