a mail courier chsrges a base fee of $6.95 plus $9.50 Per package being delivered if X represents the number of packages delivered which of the following equations could be used to find Y the total of mailing packages

B. y=9.50x+6.95

Step-by-step explanation:

Y equals the total cost to deliver x amount of packages.

Regardless of the number of packages shipped, you will always be charged a minimum of $6.95

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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

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled