Shannon bought some cheese at a grocery store at $4 per pound for cheddar cheese and $5 per pound for Swiss cheese she spent a total of $31.69 on cheddar and Swiss cheese if shannon bought 63 pounds of cheddar cheese at the grocery store about how many pounds of Swiss cheese did she buy?

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

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".

do i do it on a graph?

step-by-step explanation:

is this part of a question or something