Answer: 
Step-by-step explanation:
Let d be the distance from Nadia's home to the grocery store.
Given : Nadia traveled uphill to the grocery store for 30 minutes at just 4 mph.
∵ 1 hour = 60 minutes.
Then, 
Since 
Then, 
Also, She then traveled back home along the same path downhill at a speed of 12 mph.
Then, Time taken to travel back home = 
Average Speed =
Hence, her average speed for the entire trip from home to the grocery store and back =
If you scroll up I answered a previous question like this in the same subject
130 stamps is the answer you are looking for
Answer:
D. for the first one, A. for the second (not certain)
Step-by-step explanation:
1. 36/2 (two books every visit) = 18, multiplied by 3 because that's how many often he does to the library (every 3 weeks)
2. 13/2 = w/5 because for every 13 cups of water, there is two cups of cleaner, so for w (unknown amount of water) there would be 5 cups of concontrated cleaner.
Answer:
A
Step-by-step explanation:
given y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
to find k use the given condition x = 24 and y = 360
k = 
= 
= 15
Hence y = 15x is the equation → A
