Straight-Line Graph Q1) Angle ABC is 90° and M is the midpoint of the line AB. The point C lies on the y-axis

a) Find the coordinates of B and C

b) Find the area of triangle ABC

Q2) A is the point (-4,5) and B is the point (5,8). The perpendicular to the line AB at the point A crosses the y-axis at the point C.

a) Find the coordinates of C

b) Find the area of triangle ABC

Below is the attachment for the figure of question 1

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".

you can use a^2+ b^2=c^2