You can't add
In order to add matrices they both have to have the....
Same dimensions
When does a subtraction matrix have no solution?
Dimensions are different
4 5
6 3
-18
A rectangular array of mathematical elements
What is a Matrix
If you stole 7 suckers from Frank, you ate 2 gave away 3 and hid 4, what does that tell you?
I had a couple to start with or I already had 2
(4 5)+(2 3)
(6 8)
(4 6)-(8 10)=
(-4 -4)
-3 4
-5 6
2
Individual entry or component of the matrix
What is an element
How much is 2,000 pennies?
20 dollars
-3 4
-5 6
Plus
4 7
8 2
1 11
3 8
7 8
4 3
Minus
9 3
5 -4
-2 5
-1 7
-5 3
-2 1
1
Things that surround a matrix
Brackets
What is PI used for?
Eating or measuring the area of a circle
-1 8
-5 7
Plus
9 4
-5 7
8 12
-10 14
5 7
8 3
Minus
5 8 3
2 4 6
No solution
10 12
17 18
-24
Number of rows=Number of columns
What is A Square matrix
Dylan had 64 watermelons that he bought at the store for $2.67 a each. He wants to make 75% profit, what should he sell each one for?
$4.67
-90 57
12 72
Plus
80 -67
54 27
-10 -10
66 99
10 15 17
82 54 -17
Minus
12 18 -46
64 71 57
-2 -3 63
18 -17 -74
-17 20
-2 -15
295
ad - bc =
Determinant
If I had 2, double what I had, gave away 1/4 of it, then tripled what I had, then 1/3 was stolen from me, but then I was able to double what I had again, what am I left with?
12