It is negative association, not positive since the line is going down.
Collect like terms
-3w - 7 w =5
Divide both sides by -10
-10w =5
w = -1/2
Answer:
-1/2
Step-by-step explanation:
Add 12 to both sides 8b=-4
Divide by 8 on both sides b=-4/8
Simplify b=-1/2
Answer: x = 40
have: ∠A + ∠B + ∠C + ∠D = 180°
⇔ x + 6 + x + 4 + x +10 + x = 180°
⇔ 4x + 20 = 180
⇔ x = (180 - 20)/4
⇔ x = 160/4 = 40
Step-by-step explanation:
Answer:![C=2x^2+\frac{8400}{x}](https://tex.z-dn.net/?f=C%3D2x%5E2%2B%5Cfrac%7B8400%7D%7Bx%7D)
Step-by-step explanation:
Given
Volume of box ![V=350\ m^3](https://tex.z-dn.net/?f=V%3D350%5C%20m%5E3)
Suppose base square has a length ![x\ m](https://tex.z-dn.net/?f=x%5C%20m)
and vertical walls has length of ![y\ m](https://tex.z-dn.net/?f=y%5C%20m)
volume ![V=x^2y](https://tex.z-dn.net/?f=V%3Dx%5E2y)
![y=\frac{350}{x^2}](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B350%7D%7Bx%5E2%7D)
Cost of bottom material
per square meter
Cost of side material
per square meter
Total cost
![C=x^2 \times 2+4xy\times 6](https://tex.z-dn.net/?f=C%3Dx%5E2%20%5Ctimes%202%2B4xy%5Ctimes%206)
![C=2x^2+4x\times \frac{350}{x^2}\times 6](https://tex.z-dn.net/?f=C%3D2x%5E2%2B4x%5Ctimes%20%5Cfrac%7B350%7D%7Bx%5E2%7D%5Ctimes%206)
![C=2x^2+\frac{8400}{x}](https://tex.z-dn.net/?f=C%3D2x%5E2%2B%5Cfrac%7B8400%7D%7Bx%7D)