Here are the questions:
an expression is shown below:

2x3y + 8xy − 4x2y − 16y

part a: rewrite the expression so that the gcf is factored completely. (4 points)

part b: rewrite the expression completely factored. show the steps of your work. (6 points)

now, here's my problem:

my
part a: ↓
gcf of coefficients: ↓
coefficients: 2, 8, -4, -16
factors of 2: 1, 2
factors of 8: 1, 2, 4, 8
factors of -4: -1, 4, 1, -4, -2, 2
factors of -16: -16, 1, 16, -1, -4, 4, -2, 8, 2, -8
common factors: 1, 2
gcf: 2
gcf of variables: ↓
variables: x^3y, xy, x^2y, y,
factors of x^3y: x^3, y, x, 3
factors of xy: x, y
factors of x^2y: x^2, y, x, 2
factors of y: y
common factors: ? ?

don't i need a gcf for both x and y? is it prime, or is it only y as the gcf of the variables? me !

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

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.

p - 6

step-by-step explanation

so you know that it cost $6 to see a movie you subtract p - 6 to get your answer

hope this !