Quadrilateral abcd is shown on the grid. jonah finds the length of the sides of the quadrilateral before finding the perimeter. which statement is true about the length of the sides of quadrilateral abcd? side cd has a length of units. side bc has a length of units. side da has a length of 5 units. side ab has a length of 6 units.

it is B ) Side BC has a length of square root 10 units.

Step-by-step explanation:

I JUST TOOK THE TEST

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

ian gone lie this got me confused

step-by-step explanation: