Matt can buy an 8-ounce jar of salsa for $2.79 or a 15-ounce jar of salsa for $5.54. which jar has the best unit rate? and how did you get your answer?

the 8 ounce has a better unit rate

Step-by-step explanation:

You divide 8 by 2.79 and get 2.87. Then you take 15 and divide it by 5.54 and get 2.7. Since 2.87 is the bigger number that's the correct answer

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".