The height of the isosceles triangle, the dashed line, divides the base in half. If the two equal sides are 17 cm and the entire base is 8 cm.
A
What is the length of one leg of the base?

What is the equation to find the height, the dashed line?
What is the height of the triangle? Round to one decimal place.

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".

answer: your answer is a