The longest side of a triangle is 8 less than 3 times the longest side of a similar triangle. If the shortest sides of the triangles are 15 and 6, respectively, then what are the lengths of the longest side of each triangle?

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".

1 is c

2 is a

3 is a

step-by-step explanation:

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

3

step-by-step explanation:

because where the point where the 2 lines intersect is (3,-1) the x value is 3