HELP PLEAS Kadesha is simplifying the expression below. Negative (x minus 3) minus 2 (x minus 1) She lists the steps that she uses to simplify the expression as follows: Step 1: Distribute –1 through (x minus 3), and distribute –2 through (x minus 1). Step 2: Rewrite the expression as Negative x minus 3 minus 2 x minus 2. Step 3: Combine –x and –2x, and combine –3 and –2. Step 4: The simplified expression is Negative 3 x minus 5. In which step did Kadesha make the first error? She made the first error in Step 1 because only –2 should be distributed through the parentheses. She made the first error in Step 2 because Step 2 should be Negative x + 3 minus 2 x + 2. She made the first error in Step 3 because –x and –2x cannot be combined. She made the first error in Step 4 because the simplified expression is Negative x minus 5.

She made the error in step 2.

Two negatives equal a positive.

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

i believe the answer is c.