Answer: 2/3 of an hour.
Step-by-step explanation: The constant rate of the lifeguard filling the pool is 1/3 of the pool every 1/2 hour. If she fills it for an hour, she'll get 2/3 of the pool filled. Therefore, it'll take the lifeguard 1 hour to fill the pool 2/3 of the way.
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405=25n+80
405-80=325
325÷25=13
Answer:4.375 miles left to go
Step-by-step explanation:
Answer:
Step-by-step explanation:
By Pythagoras Theorem:

Answer:
15
Step-by-step explanation:
The given equation is


When we multiply we obtain the equations:


We add both equations to obtain:

Divide both sides by -7 to get:
