I WILL MARK BRANLIEST Emma was solving the equation t - 4 = 16. She said, "I'm looking for a number t that is 4 less than 16. So t = 12." Which statement best describes the flaw in Emma's reasoning?
O Emma's answer is right but she should just subtract 4 from both sides of the equation.
O Emma's answer is wrong but she thought about the equation correctly.
O Emma is confused about which number the 4 is being subtracted from
O Emma should subtract the 16 from the 4 instead of the 4 from the 16.

C. Emma is confused about which number the 4 is being subtracted from

Step-by-step explanation:

The answer is C.

Emma would be correct if 4 was being added or if the equation would be set up so it reads 16-4 = t. However, she is wrong because 12-4 does not equal 16.

2,600 divided by 80 = 32.5

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