Winnie picks a 2-digit number. Grogg doubles the ones digit of winnie's number. He adds the result to tens digit of winnie's number. Grogg's final anwser is the same as winnie's number What is Winnie's number? I'LL GIVE YOUR A BRAINLST

winnies number: 19

what grogg calculates: 18 + 1

9*2 is 18, he adds that to the tens digit, wich is 1

tbh, I just tried it out, got really stuck trying to do it with variables.

the trans digit had to be at least one, so I tried the process for 11, 12, 13...

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