Nirvana

yay!! :)) 

also correct me if i am wrong.

$2/5a+6 \begin{bmatrix} 3&\\ -2& \\7& \end{bmatrix} = \begin{bmatrix} 15& \\ -10 & \\35 \end{bmatrix}$

we realize that the each element in the matrix was multiplied by 5 so a must be a value that will make 2/5a+6= 5 therefore a must be a negative reciprocal of 2/5 thus we will get -5/2 because that gives us -1 and when you add -1+6=5 which satisifes the equation. 

hope this helped. :) 

oh my god is that why i kept getting the wrong answer,,, thank you for pointing my mistake out!! :) 

im glad to hear that you had a great day! :)) 

of course CPhill!! you're awesome!! :))

edit: i was wrong! dont listen to what i said

thank you so much! =)

hey Rom, not sure if you see this but i just wanted to thank you!! because of your awesome tips, i was able to get everything done on time :) 

the picture is not showing up, is there a link you can put that shows the picture?