Thom's restaurant bill is $45, and he leaves a 20 percent tip. what is the total cost for thom's meal?

Multiply the price before the tip by .20

Add 9 to the total:

So, the total cost for Thom's meal is $54

The answer is $54.

Step-by-step explanation:

To find the percent, you multiply $45 by 20 percent (or 0.2). 45 x 0.2 = 9.

$9 is the 20 percent tip.

The total cost is then found by adding $9 to the $45. You then get $54.

Hope this helps! :)

(I apologize if this isn't correct. Forgive me if it isn't)

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: