Which transformations could have occurred to map aabc to aa"b"c"? a rotation and a reflection a translation and a dilation a reflection and a dilation a dilation and a rotation

a dilation and a rotation

Step-by-step explanation:

From the given figure it can be seen that ΔABC is reduced to ΔA"B"C" so there must be dilation.

Also, when there is rotation about point C to create ΔA"B"C".

Therefore, the transformations could have occurred to map ΔABC to ΔA"B"C" are a dilation and a rotation.

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

- 70

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