This is esay to do when you realize the the speed of mowing is addtive. This is if John mows at 1 lawn / (2/3) hour and Gerge mows at 1 lawn / 1hour, the total speed of mowing is:
1 / (2/3) + 1 = 3/2 + 1 = 5/2
=> 5/2 of lawn per hour
Now, the time is calcualted as the amount of lawn divided by the speed:
1 lawn / (5/2 lawn/hour) = 2/5 hour.
Answer: 2/5 of an hour.
Answer:
23018
Step-by-step explanation:
do 677 times the 34 years because it the total amount of money.
Answer:
Step-by-step explanation:
We can set up the following system of equations:
, where 
is the number of dimes she has and 
is the number of nickels she has.
Multiplying the second equation by -5 and adding both equations lets us isolate and solve for :
Plugging 
into any of the two equations will let us solve for :
.
Therefore, she has 14 nickels.
Answer:
-23 degree
Step-by-step explanation:
=>-14-5-3-1
=>-23
B, just because the diagonals are perpendicular doesn't mean they are equal in length, you can get a Kite with perpendicular diagonals
