Answer: if you want help I found a vid
Step-by-step explanation: press link here-
4x+15y=13 (1)
3x+5y=16 (2)
(2) * 3 --> 9x+15y=48 becomes (3)
(3) - (1)
5x=35
x=7
sub x =7 into (1)
4(7)+15y=13
28+15y=13
-28 -28
15y= -15
y= -15/15
y= -1
therefore x=7 and y= -1
The work is simply the dot product of the force and displacement (which I assume are given in Newtons and meters, respectively):
<em>W</em> = <em>F</em> • <em>d</em>
<em>W</em> = (5i + 3j - 2k) N • ((4i<em> - </em>j + 3k) m - (j + k) m)
<em>W</em> = (5i + 3j - 2k) • (4i - 2j + 2k) Nm
<em>W</em> = (20 - 6 - 4) Nm
<em>W</em> = 10 J
Minus 3x from 4x and the answer is x=5