Answer:
5
Explanation:
The sum of the digits of the number is ...
(4+1+3)+(4+6+5)+(7+8+9) = 8+15+24 = 47
The sum of those digits is 4+7=11, and those digits sum to 1+1 = 2.
That is, the value of the number mod 9 (or 3) is 2.
The ones digit is odd, so the value of the number mod 2 is 1.
This combination of modulo values tells you the mod 6 result is 5.
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<em>Additional comment</em>
We can look at the (mod2, mod3) values of the numbers 0 to 5:
0 ⇒ (0, 0)
1 ⇒ (1, 1)
2 ⇒ (0, 2)
3 ⇒ (1, 0)
4 ⇒ (0, 1)
5 ⇒ (1, 2) . . . . the mod {2, 3} results we have for the number of interest.
This process of adding up the digits repeatedly is referred to as "casting out 9s." The result of it is the modulo 9 value of the number (with 0 mapped to 9). Checking the mod 9 result of arithmetic operations is one quick way to spot certain kinds of errors. It can also be used as part of a divisibility test for 3 or 9.
Answer:
1. To bring down the pressure of the refrigerant
2. To meet up with the load to be refrigerated (the amount of heat to be evacuated)
Explanation:
1. To bring down the pressure of the refrigerant
The high pressure of the refrigerant coming from the condenser require reduction to enable vaporization in the evaporator at the proper temperature
The throttling valve as a small aperture through which the refrigerant flows that lowers the pressure of the refrigerant to a point at which the refrigerant vaporize of which the refrigerant then passes into the evaporator in a partly as liquid and vapor at a low temperature and pressure
2. To meet up with the load to be refrigerated (the amount of heat to be evacuated)
The throttling valve allows more refrigerant to flow through it when there is an increased load at a higher temperature to be refrigerated
Similarly, in a condition of reduced refrigeration load, hence, a lesser amount of heat to be evacuated, the throttling valve restricts the amount of flow of the refrigerant through it.
Answer:
2
Explanation:To find the solution we must first make the transformations to international units,
In this way:
Inches of length (L) to feet =
So we can identify the area by hour:
Once the area is identified, we now identify the number of passes required,
Passes required = Area x number of passes
We transform speed to international units
So we can identify the covered area
where
m = drum widht
p = efficiency
In this way we obtain the number of rollers given by:
No. of Rollers = Passes required / covered area
No of rollers = 48136/40269
No of rollers = 1.19, that is, 2
Read more on Brainly.com - brainly.com/question/13686900#readmore.
Answer:
y=3
x=-8
Explanation:
<h3 />
2x+4y=-4 (x 3)
3x+5y=-3 (x -2)
6x+12y=-12 <em> (6x and</em>
-6x-10y=6 <em> -6x cancel)</em>
12y=-12 <em>(12y-10y)</em>
-10y=6 <em>(12-6)</em>
2y=-6
y=-6÷2=3 <em>(2 is brought across equals it divides)</em>
y=3 <em>(now replace 'y' in original equation with 3)</em>
2x+4(3)=-4 <em>(</em><em>4</em><em>×</em><em>3</em><em>=</em><em>1</em><em>2</em><em>)</em>
2x+12=-4
2x=-4-12 <em>(</em><em>12</em><em> </em><em>becomes</em><em> </em><em>-</em><em>12</em><em> </em><em>brought</em><em> </em><em>across</em><em> </em><em>equals</em><em>)</em>
2x=-16
x=-16÷2=-8 <em>(</em><em>multiply</em><em> </em><em>1</em><em>6</em><em> </em><em>across</em><em> </em><em>equals</em><em> </em><em>is</em><em> </em><em>divide</em><em> </em><em>16</em><em>)</em>
x=-8
*these are my workings on this equation, they may not be correct*