Which question is being asked in this story problem?

mary bought 3 bouquets of flowers on monday. she paid $5 for each bouquet. on friday she bought 1 more bouquet than on monday.

how much did mary spend on bouquets on friday?
a.
how many bouquets of flowers did mary buy on friday?
b.
what is the total amount of money mary paid for flowers on friday?
c.
how many more flowers did mary buy on friday than monday?
d.
how much does one bouquet of flowers cost?

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

but which class are u may know that first

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

sorry i got nothing

step-by-step explanation: