Acertain car uses 8 gallons of gasoline to travel 184 miles. how many miles can the car travel if it has 7 gallons of gasoline?

161 miles

Step-by-step explanation:

We need to first find the number of miles the car can travel in 1 gallon. Then we will mulitply that with 7 to get number of miles travelled in 7 gallons.

To find unit rate, we divide number of miles travelled (184) by number of gallons used (8). So

Miles per gallon = 184/8 = 23 mpg

Thus, is 7 gallons, it would travel:

7 * 23 = 161 miles

So first, convert 4 ft. 10 in. into feet.
The equation is 4(12)+10 since there are 12 inches in a foot. 
This would get you 58 inches.
Now his brother is 68 inches so subtract. 
68-58=10. 

Darin's brother is 10 inches taller than Darin.