(1).. 2x + 4y - 3z = -7
<span>(2).. 3x + 1y + 4z = -12 </span>
<span>(3).. 1x + 3y + 4z = 4 </span>
<span>****************** </span>
<span>ok.. we're going to put this into matrix form.. where we drop x, y, and z </span>
<span>2.. 4.. -3.. | ... -7 </span>
<span>3.. 1.. .4.. | ... -12 </span>
<span>1.. 3.. .4 . | ... 4 </span>
<span>ok? </span>
<span>now.. I'll designate the rows (1), (2), (3).. ok? </span>
<span>new (1) = -2x(3) + (1) </span>
<span>new (2) = -3x(3) + (2) </span>
<span>ie... </span>
<span>0..-2..-11. | .. -15 </span>
<span>0..-8.. -8.. | ... -24 </span>
<span>1.. 3.. .4 . | ... .+4 </span>
<span>new row (2) = old (2) / -8 </span>
<span>0..-2..-11. | .. -15 </span>
<span>0.. 1.. 1.. | ... +3 </span>
<span>1.. 3.. .4 . | ... +4 </span>
<span>new (1) = 2xold(2) + 1 </span>
<span>new (3) = -3xold(2) + 3 </span>
<span>0.. 0..-9 .. | ... -9 </span>
<span>0.. 1.. 1.. | ... +3 </span>
<span>1.. 0.. .1 . | ... -5 </span>
<span>new row(1) = old row 1 /-9 </span>
<span>0.. 0.. .1 .. | ... +1 </span>
<span>0.. 1.. 1.. | ... +3 </span>
<span>1.. 0.. .1 . | ... -5 </span>
<span>new (2) = old(2) - old(1) </span>
<span>new (3) = old(3) - old(1) </span>
<span>0.. 0.. .1 .. | ... +1 </span>
<span>0.. 1.. 0.. | ... +2 </span>
<span>1.. 0.. .0 . | ... -6 </span>
<span>so.. (x,y,z) = (-6, +2, +1)..
the last answer is correct </span>
1a= (2x+5)+3x+15
1b= (2(4)+5)+3(4)+15=40
2a= (3x+5)•(4x-3)
2b= (3(2)+5)•(4(2)-3)=55
2c= 2(x) or 2(2)
How I got 2c is the perimeter of the rectangle LMNP subtract from (2(2)+9)+(2(2)+9)=26 which in return means you subtract 30 from 26 and get 4 which is 2(2) or 2x
Answer:
7/3
Step-by-step explanation:
The quotient is 10.6 the answer is B.
