Can someone help me with this?

1200

Step-by-step explanation:

30 * 40 = 1200

the actual total cost would be 1326 because 39 * 34 = 1326

1. 1200

2. 1330

Step-by-step explanation:

this is the answer beacuse 30*40=1200 then 34*39= 1326 when your round it would be 1330!

HOPE THIS HELPS BRAINLIEST? HAVE A GREAT DAY?!

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".