Answer:
6 : 5
Step-by-step explanation:
Rate = 
But Rate is also equal to number of lawns mowed in a certain amount of time.
Since ratio should always be in terms of simple whole numbers.
If 6/5 lawns are mowed in 1 hour, then,
6 lawns will be mowed in:
=
= 5 hours.
therefore, 6 laws will be mowed in 5 hours.
Ratio of lawns to hours in 6:5
When it says "is a less than b" , it means b - a not a-b.
x+y +z = 105
z = 10y - 11
2x = 3y + 7
Substitute expressions in terms of "y" for x and z in top equation.
Substitute value of y to find x and z:
You need to supply a picture. but a concentric circle is two circles sharing the same center
So a mile has 5280 feet.
21,129/5280= 4 mph
multiply
4 x 2 = 8 miles in 2 hours
151.2 miles x miles
------------------ = ----------------------
3.4 hours 2.2 hours
x miles = (151.2 miles * 2.2 hours) / 3.4 hours
x miles = 97.8 miles
answer
97.8 miles in 2.2 hours
