I have no clue how the answer is what is is pls help

Step-by-step explanation:

Whole race was 12 meters

Jody:

12-3=9

To get to 8 meters, Jodi took 8 sec, so to get to 9, Jodi took 9 sec. SO YOUR ANSWER IS WRONG!

Carson:

Started at 0.

12/3=4

4*2=8 seconds!

Carson won with a time of 8 seconds

Jody 2 x 2=4 4x12=48 48÷2 =24

Carson 3x2=6 6x12=72 72÷9=8

54

step-by-step explanation:

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