Miguel completed the division problem below. what is miguel's error?
145
0.52) 754
–
52) 7540
-52
234
- 208
260
- 260
he included a 5 in the quotient, which does not belong.
he multiplied the divisor by 10 and the dividend by 100.
he subtracted 208 from 234 incorrectly.
he multiplied the divisor by 100 and the dividend by 10.

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".

6 cm

step-by-step explanation: