17+2.6b=30
answer my question i will make you brainliest if you do it correct

I asume you are trying to fin b so

17+2.6b=30

-17           -17

2.6b=13

/2.6     /2.6

b=5

Hope this helps .-.

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

it is c!