Inc on (-inf,0)
Dec on (0,inf)
3. 140 m^3
(3 x 6 x 7) + (1 x 2 x 7) = 126 + 14 = 140
4. 216 in^3
(4 x 4 x 9) + (3 x 4 x 6) = 144 + 72 = 216
3x + 3 - x + 4 = 21
3x - x = 2x
2x +3 +4 = 21
3 + 4 = 7
2x + 7 = 21
-7 -7
2x = 14
--- ----
2 2
x = 7
Answer:
3x-4y=-16
Step-by-step explanation:
Answer:
B) 
Step-by-step explanation:
3x + 1 = x - 1
-3x - 3x
___________
1 = −2x - 1
+1 + 1
_________
2 = −2x
_ ___
−2 −2
[Plug this back into both equations above to get the y-coordinate of -2]; 
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