Me guysi need to know if the answer its correct or not . i choose b

, where,

Step-by-step explanation:

Domain of a graph is the set of all possible values of . It is the independent variable and is plotted along the axis.

From the graph,

The number of cars washed is along the axis. So, the domain includes the possible values for the number of cars washed.

The starting value of the graph is at point (0,-20) and the end point is (12,40)

So, the possible values of x varies from 0 to 12.

Therefore, the domain of the graph is:

, where,

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

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons