Obtain an equivalent system by performing the stated elementary operation on the system. Replace the second equation by the sum of itself and 2 times the third equation. A. 6x + 10y + 112 = -18

B. 4x - 4y - 5z = -20

C. 5x- 6y+11z=10

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

hm let me think hm think think hm think yes

a reflection across the x axis and a 90 degree rotation left and right.

it would have to be 3/0