Stu

Happens too often.

Round the number  to nearest multiple of 10. 72 becomes 70. 58 becomes 60. Then add it. HEre is a link. http://www.ixl.com/math/grade-3/estimate-sums

. Ok thanks. I knew how to solve it, I am more refering to words being literal.

Can anyone assit me with this. I cannot get the answer Alan posted. It's due in the morning and it's late. Thanks. Please post something to assit me. I have 

Can someone help with the determinant , and solving the inverse. I am not able to solve it correctly which is confusing me as to why. I should be able to.

Working on this I solved the determinant from the top for and determinant of the other 2x2. Doing this the scalar in colomn 3 is a 0. What do I do? It makes the whole equation 0 right? Should I have soved with the second column?

It means bump post to the top but bump was to short and needed more info. My post went unanswered and I didn't want it to get lost. 

Bump. Bumpety bump bump. 

I didn't know. WE always just add zeros and work to solve for unknowns LHS | RHS. What is the difference? I can guess but would like a better answer than just guessing. Thanks.