Please help! And 20 points! :3 I need help with this 1 question.

Will you be my boy.friend?

Step-by-step explanation:

-30%

Step-by-step explanation:

Use the above formula to find the percent change. So, replacing the given values, we have Percent change = [ (35 - 50) / 50] x 100 = -30 % (decrease) Where: 50 is the old value and 35 is the new value. In this case we have a % of decrease because the new value is smaller than the old value.

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".