The cost for x number of student to attend a after school sporting event can be represent by the function c(x) .if c(124)=558 select the folowing statement that are true
124 students paid to attend the event.
558 students paid to attend the event.
the cost for one student to attend the event cannot be determined.
the cost for one student to attend the event is $4.50
the event generated $124 from student revenue.
the event generated $558 from student revenue

The answers are 1, 4, and 6

Step-by-step explanation:

The answers are 1, 4, and 6 because 

1. C(number of students that paid to attend) which was 124.

4. If you divide 558 from 124 it is generated the cost to be averaged at 4.50

6. The number is equaled to 558 so that is the event generated from student revenue.

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

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step-by-step explanation: