Hello,
Answer B
y=-x^4+1
y'=-4x^3
y"=-12x² is always <0 : concavity downside.
Answer:
c
Step-by-step explanation:
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The drawing seems to suggest that angles BFA, AFE and EFD span a straight angle, just like angles BFC and CFD
This means that you have

But we know that both BFA and EFD measure 70 degrees, so the equation becomes
![[tex]70+AFE+70=180 \iff AFE + 140 = 180](https://tex.z-dn.net/?f=%20%5Btex%5D70%2BAFE%2B70%3D180%20%5Ciff%20AFE%20%2B%20140%20%3D%20180)
So, if you subtract 140 from both sides, you have

Answer:
D) Distributive
Step-by-step explanation:
2(x + 7) + 3x = 12
You need to put the equation in its simplest form.
That is why you need to distribute first.
Outcome:
2x + 14 + 3x = 12
Answer:
6 ?
Step-by-step explanation: