matrix help

Question

matrix help

Hero · Answer

Where's the matrix?

Hero · Answer

@alpha

alpha · Answer

https://prnt.sc/pbznhb here is the problem and i completed #1 im not sure if im correct. how do i go about solving #2 https://prnt.sc/pbznnz

Hero · Answer

For #1 where are your matrices representing $P$ and $I$ ? I don't see them

alpha · Answer

[3 4 1  1]   = Matrix P
 6  6  4 6
[ 2  2  5  4]

alpha · Answer

Matrix I= [3] 
                  5
                   2
                    [6]

Hero · Answer

Your work for #1 is all correct.

Hero · Answer

For number #2 you already calculated the cost of Polly's Pies

Hero · Answer

Let's see if you can figure it out on your own since you've already calculated the cost.

Hero · Answer

@alpha are you figuring it out?

alpha · Answer

so multiply my answer with [2254] ?

alpha · Answer

wait nvm thats not the cost

Hero · Answer

lol, no it is not.

alpha · Answer

wait i think i got it please bear with me

alpha · Answer

ok so

Hero · Answer

As I said you already calculated the cost of Polly's Pie Ingredients.

Hero · Answer

It should not be too difficult for you to figure this out since you already came up with the correct matrices representing $P$ and $I$

alpha · Answer

so i already have my answer lol?

Hero · Answer

Yup, you do. You just have to think about what you've done more than just grouping numbers together and multiplying. You should try to understand what each number represents before multiplying and adding them together.

alpha · Answer

i see .. thank you very much!

Hero · Answer

Did you figure out how much Polly paid for her pie ingredients? You still have not yet posted that.

alpha · Answer

sorry for the late reply yes i think i have it figured out i just need to mutiply the 
both [2 2 5 4] * [3]
                         5
                         2
                       [ 6]

Hero · Answer

Correct. Which you had already done