Acar gets 40 km per gallon of gasoline. how many gallons of gasoline would the car need to travel 1240 km

Do 1,240 divided by 40

= 31 gallons

1 gallon40km
x gallon1240km
so,1240/40=31 gallon

A) radius= 4 units

b) (x+5)^2+(y-3)^2=4^2

The distance between the x values in the center point and a point included in the graph will give you the radius.
The x values are 4 units apart (-5 to -1) so your radius is 4 units

Circle formula:
(x-h)^2+(y-k)^2=r^2
Where (h,k) is the center point and r is the radius

Replace h with -5, k with 3, and r with 4 to get equation listed in answer above

Hope this helps!!