At 6am, the tempature was at -8, before noon , the tempature had risen 6. The tempature at 6pm. Was -10. Which integer represents the tempature change between noon and 6pm.

-8

Step-by-step explanation:

Given the following :

Temperature at 6:00 a.m = - 8

Before noon, temperature had risen by 6

Temperature at 6:00 p.m = - 10

Which integer represents the tempature change between noon and 6pm?

Temperature before noon :

Temperature at 6:00 a.m + rise in temperature

(-8 + 6) = - 2

If temperature at 6:00 p.m = - 10 ;

Then change in temperature between noon and 6:00 pm will be ;

-10 - (-2)

-10 + 2

= - 8

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: howdy

step-by-step explanation: