If the amount of time taken to go said distance is x and the amount of time taken to go back said distance is y, then the amount of miles total is 7x+3y due to that for every hour, she adds 7 miles when going there and 3 miles for walking back. In addition, since the total amount of time is 4 hours, x+y=4 as the total time spent as well as 7x=3y due to that they're the same distance.
x+y=4
7x=3y
Dividing the second equation by 7, we get x=3y/7. Plugging that into the first equation, we get 3y/7+y=4=10y/7 (since y=7y/7). Multiplying both sides by 7 and then dividing both by 10, we get 28/10=2.8=y in hours. Since 0.1 hours is 60/10=6 minutes, and 0.8/0.1=8, 6*8=48 minutes=0.8 hours, meaning that she should plan to spend 2 hours and 48 minutes walking back
55.
1 * 10^4 = 10,000
3 * 10^3 = 3,000
10,000/3,000 = 3.333
Answer: B
56.
At the beginning, the month was month zero. x = 0
y = 213.73 * 0 + 75.62
y = 75.62
He started with $75.62.
Each month that passes he has $213.73 more money in his account.
Answer:
2oz are 1/4 cup
done easy.
Step-by-step explanation:
Answer:
Option B and C
Step-by-step explanation:
Option A: NO
38 < 25
38 is NOT less than 25
Option B: YES
38 < 40
38 is less than 40
Option C: YES
38 < 120
38 is less than 120
Answer:
1. yes
2. yes
3. no
4. no
5. yes
Step-by-step explanation: