<span>Factor out 2
x^2 +4x -6 = 0
Take half middle coefficient and square it:
x^2 +4x +4 -6 = 4
(x+2)^2
= 10
x+2
= sqrt(10)
x
= +-sqrt(10) -2</span>
Make this more clear please so we can answer for you
Let's say that x is the number of days he tweets. Now, if he tweets any number of days, we can represent all of that with just x. So out expression will look like:

Hope this helps!
The volume is 240ft^3. v=Ah/3. v=(72)(10)/3. v=720/3. v=240.
Answer:
It's choice A.
Step-by-step explanation:
Kevin is 3 years older than Daniel gives:
k = d + 3.
2 years ago kevin is aged k - 2 and daniel d - 2 years.
So:
k - 2 = 4(d - 2).