A chef is estimating the cost to prepare a fixed-price menu for x guests. The anticipated cost of the appetizers is
a(x) = 3.25x, the anticipated cost for the main course is m(x)
= 5.25x, and the anticipated cost for the dessert course is
d(x) = 1.25x.
If the functions are combined so that
c(x) = a(x) + m(x) + d(x), then the function c(x) in
point (40,
D.

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12

answer is : muchas/tipicas

have a nice day!

~recklesschicken

answer by yourhope:

hi! : )

a farmer that lived in ancient egypt would most likely be barried in the sand, in the desert!

: )