Keith purchase a prepaid prepaid phone card for $20 cost cost $0.07 a minute using this car the credit scenes are left on the card after it has used minutes of calls again by the following C equals 20.00 - 0.07 X how much credit is left on the card after keep using it for 40 minutes of calls

false

step-by-step explanation:

i looked it up

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".

it is b)

hope this : )

step-by-step explanation: