The amount of balls in a given layer can be found by squaring the layer it is in
4 layers
top layer (1st) is 1
2nd is 4
3rd layer is 9
4th is 16
add them up
1+4+9+16=30
30 in that pyramid
Answer:
2+x
Step-by-step explanation:
2(1-x)=2-2x
2-2x+3x=2+x
It is just 18 :)It is just 18 :)
It is 70
i cant explain it right now i have work to do so sorry:)
