Mabel had a skating rink party for her birthday the cost to rent the party room was $75 the cost of the ticket for each of the 6 people who came to the party was $8

$123

Step-by-step explanation:

The question isn’t complete, it is however completed below;

Mabel has a skating rink party for her birthday. The cost to rent the party room was $75. The cost of the ticket for each of the 6 people who came to the party was $8. What was the total cost of the party?

Let’s solve now!

In this question, we are asked to calculate the cost spent on a party if the room in which the part was hosted cost a certain amount and the 6 people invited paid a certain ticket fee.

To calculate this, we simply add the amount of the ticket plus the amount for the room.

The total amount paid for the ticket would be 6 * 8 = $48

Adding this to the room cost will yield ;

$48 + $75 = $123

Hence the party cost a total of $123

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

c is the answer

step-by-step explanation: