Answer:
To get system B, the SECOND equation in system A was replaced by the sum of that equation and the FIRST equation multiplied by FOUR. The solution to system B IS de same as the solution to system A
Step-by-step explanation:
x-y=3 equation 1
-2x+4y=-2 equation 2
so, multiplying by four the equation 1 we have
4x-4y=12 equation 3
later sum equation 3 and equation 2 we have
2x=10
Answer:
29 Dodecagon
30 Heptagon
31 Octagon
32 Hexagon
Just divide 360 by the number of sides to find the exterior angles
and 900 by the number of sides for the interior
Answer:
3.85666667 minutes of 260sec
Answer:
1 x 2 x 2 x 2 x 2 x 2 x 1 = 2^5 = 32 ways
