Find the value of g when 5g+15 equals 2g+21. use pencil and paper. explain how you can check the value you found for g is correct. if your check does not work, does that mean your results are incorrect? explain

$79500

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.