Answer:
There are 36 possibilities per character (26 lower case letters + 10 numbers), so the total number of permutations are 36^4 = 1,679,616
Step-by-step explanation:
2/3(3x+9)=-2(2x+6)
2/3(3x+2x)=-2(9+6)
2/3×5x=-2+15
10x/3=13
3x=13
x=13-3
x=10
They're both parabolas.
One is a parabola opening up (blue), the other one is opening down.
In dutch, we call them what can be translated as mountain-parabolas and valley-parabolas.
I also saw the terms "concave up" and "concave down".
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