20 I think it is 20 .................
I would say 15 because most of the games are social media and some of them are puzzle games because they get bored
16.95+.05x=22.95+.02x
Subtract .02x from each side and subtract 16.95 from each side
.03x=6
Divide by .03
x=200 minutes.
Your answer is A
It’s really hard to deal with this
<span>A tree must be connected by definition. This means that there can be no vertices of degree 0 in a tree.
Assume for contradiction that we have v vertices and that v - 1 have degree at least degree two. Then we know that the sum of the degrees of the vertices is at least 1 + 2(v-1) which is equal to 2v - 1. Therefore we know that the number of edges must be at least v- 1/2 . But this is impossible because a tree must have exactly v - 1 edges.
Thus we have shown by contradiction that every tree has at least two vertices.</span>
