Sketching Graphs of Quadratic Functions in Context - Item 33107 Elliot makes and sells key chains. His profit depends on what price he charges for a
key chain
He writes the expression (x – 10)(60 – 3x) to represent his profit based on the
price per key chain, r.
Enter Elliot's average change in profit for two different sections of the graph.

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".

the answer is b

x = -5

step-by-step explanation:

19

step-by-step explanation: