Abdi reads for twice as many hours per week as Sarwan. Together they read for a total of 24 hours in one week.
Find the number of hours each person spent reading
that week.
Write two equations to represent the information.
Use the method of substitution to find the number of hours each person spent
reading that week.

576

Step-by-step explanation:

24x24=576

rounding to the nearest thousandth would be 452,000

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".