Cannonballs are stacked in a pyramid shape with a triangular base of 5 cannonballs on a side. how many cannonballs in all are in the stack

There will be 35 cannonballs in the stack.

Step-by-step explanation:

Cannonballs are stacked in a pyramid shape with a triangular base of 5 cannonballs on a side.

The top or first layer will have a single cannonball = 1

The second layer down is a triangle that will have cannonballs

The third layer will have cannonballs

The fourth layer will have cannonballs

The fifth or bottom layer will have cannonball

Adding those all these we get;

cannonballs

Hence, there are 35 cannon balls in the stack.

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

what graph

step-by-step explanation: