Pedro is solving this number riddle using guess and check. Fourteen less than my number is eleven. What is my number? Which statements about solving the riddle are true? Check all that apply. Less than means subtraction. Subtract 14 from the unknown number to get 11. 14 – 11 = 3 25 – 14 = 11 The unknown number is 25.

The answer is 1, 2, 4, 5

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".