The ratio of blue to red chairs in mrs Vick’s class is 2:5 what is the total number of chairs in her class

7

Step-by-step explanation:

If there are 2 blue chairs and 5 red chairs there are 7 chairs total.

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 to this question is 3/19

step-by-step explanation: