Which expression is equivalent to 12a + 8

i cant see the choices but i think this is khan academy

Step-by-step explanation:

A.

By using distributive property you can figure out all the answers.

A: 4*3a, 4*2= 12a + 8

B: 4*3a, 4*8= 12a + 32

C: 6*6a, 6*2= 36a + 12

D: 6*6a, 6*8= 36a + 48

a =-2/3

Step-by-step explanation:

I can't see the answer choices but I'm going to try helping you.

12a + 8 is like a two step equation make it equal to zero

12a + 8 = 0

Subtract 8 on each side

12a = -8

Now divide by 12 on each side

a = -2/3

Hope this helps!

there are lots of ways.   pick's theorem tells us if the vertices are lattice points the area a is

a = b/2 + i - 1

where b is the number of boundary lattice points and i is the number of interior lattice points.

in the figure i count b=16, i=50 so

a = 8 + 50 - 1 = 57

let's try the shoelace formula.   the area is half the sum of the cross products of the sides.  

a(-2,6)   -2(2)-6(-5) = 26

b(-5,2)   -5(-3) - 2(-2) = 19

c(-2,-3) -2(-3) - (-3)(4) = 18

d(4,-3)   4(3) - (-3)(5) = 27

e(5,3)   5(3) - 3(1) = 12

f(1,3)     1(6) - 3(-2) = 12

a(-2,6)

each of the cross products is twice the area of the triangle with the associated side and one vertex the origin. so the area of abo=26/2=13.

area = (1/2) (26 + 19 +   18 + 27 + 12 + 12) = 57

that checks!

step-by-step explanation:

because it just is