Alice and Jessica went to the movies. They both bought tickets for $12.50 and popcorn for c dollars. Write an expression to represent the total cost Alice and Jessica spent.

12.50+c

Step-by-step explanation:

So we will have to solve this question by interpreting it first

So let's solve

They bought the tickets for $12.50 and they also bought popcorn for c dollars

So to find the total amount spent

12.50+c

Since the actual value is not given for c so we cannot solve this question further...

Therefore the final answer is 12.50+c

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

answer: haha (: i’ll go see what it is

step-by-step explanation: