If all were triangles, he would have used 12*3 = 36 matchsticks. He used 5 more than that. Since each square adds 1 matchstick, ...
Daniel made 5 squares.
You could write 6/15 as a decimal 0.40.
Therefore .48>.40
5³ = 125
125 =5³
㏒₅125 = 5³
Hello,
the graph of f(x) is joint here.
It has a form of "V" with (13,11) like vertex;
It is a minimum.
It is composed of 2 half straight lines y=-x-2 (for x<13) and y=x+2 (for x>13)