# [SOLVED]307w.WLCA.C10 computations are linear???

#### karush

##### Well-known member

the matrix at the bottom is from eMH but thot this was the way to do it... maybe not!!!

#### Country Boy

##### Well-known member
MHB Math Helper
Do you understand what this table tells you and what you are asked to do?

Let x be the number of kg of raisins used, y the number of kg of peanuts, z the number of kg of chocolate. Then one batch of "Bulk" mix requires 7x+ 6y+ 2z, one batch of "standard' mix requires 6x+ 4y+ 5z, and one batch of "Fancy" mix requires 2x+5y+ 8z.

The bottom row shows the cost of each kg of raisins, peanuts, and chocolate. x kg of peanuts costs 255x, y kg of peanuts cost 4.65y, and z kg of chocolate cost 4.80z so one batch of "Bulk" mix cost 7(4.65y)+ 6(4.65y)+ 2(4.80z)

#### karush

##### Well-known member
ok I think in LA notation $x_1, x_2, x_3$ is prefered for the matrix

why do you have y twice in 7(4.65y)+ 6(4.65y)+ 2(4.80z)

#### Country Boy

##### Well-known member
MHB Math Helper
That was a typo, of course.

It should be 7(2.55x)+ 6(4.65y)+ 2(4.80z).