50 decreased by ??? is 40% 60%
80%
19%
40%
please show me how to solve it so i can stop asking

if you decrease something by 40%

its 100% minus 40% = 60%

the question is vice versa, so 60% is the right answeer, but my calculation is the reasoning you can do in your mind.

btw, the 50 doesn't matter for that specific question.

please brainliest if possible

associative property of multiplication

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".