Given 3x+12, prove x=6

I cant because it is not an equation

Step-by-step explanation: but 3 x 6 = 18 and 18 +12 =30

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.

step-by-step explanation:

oh the deck is the size of my dic k so about 320 inches hope u get my dic k as the answer