NEED HELP ASAP !! PLS AND TY <3 WILL MARK BRAINLIEST Part A: what is the constantly of proportionality and what does it mean in this situation?

Part B: choose one ordered pair on the graph. What does it represent in this situation?

SEE BELOW

Step-by-step explanation:

A. Constant of Proportionality = 300/15 = 20

B. (30, 600)

IN 30 SECONDS MACHINE FILLS 600 BOTTLES.

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".

$79500

step-by-step explanation: