Solve the proportion

216/7

Step-by-step explanation:

196=2(x−1)x−12

2

Multiply both sides by 2(x-1)2(x−1).

\frac{6}{19}\times 2(x-1)=x-12196×2(x−1)=x−12

3

Use this rule: \frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}ba×dc=bdac.

\frac{6\times 2(x-1)}{19}=x-12196×2(x−1)=x−12

4

Simplify  6\times 2(x-1)6×2(x−1)  to  12(x-1)12(x−1).

\frac{12(x-1)}{19}=x-121912(x−1)=x−12

5

Multiply both sides by 1919.

12(x-1)=19x-22812(x−1)=19x−228

6

Expand.

12x-12=19x-22812x−12=19x−228

7

Subtract 12x12x from both sides.

-12=19x-228-12x−12=19x−228−12x

8

Simplify  19x-228-12x19x−228−12x  to  7x-2287x−228.

don't know sorry bru

step-by-step explanation:

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.