Answer:
ya im here what?
Step-by-step explanation:
Answer:
A. 57.2
Step-by-step explanation:
Given: Nelly runs = 10-mile race in 88 minutes. At the same rate but 6.5-mile race
To find: How long it would take him to run a 6.5-mile race
Solution: To calculate the how long;
<u>How to calculate running pace</u>
- Divide your run time by your distance
- If you ran 3 miles in 30 minutes: 30 min ÷ 3 mi = 10 minutes per mile pace
<u>How to calculate run distance</u>
- Divide your running time by your pace
- If your pace is 8 minutes per mile and you ran for 32 minutes: 32 min ÷ 8 min per mi = 4 miles
<u>How to calculate run time</u>
- Multiply your pace by your distance
- If your pace is 9.5 minutes per mile and you ran 3 miles: 9.5 min per mi × 3 mi = 28.5 minutes = 28 minutes, 30 seconds
<u>How to calculate running speed</u>
- Divide your run distance by your run time
- If you ran 2.5 miles and you ran for 20 minutes:
2.5 mi ÷ 20 min = 0.125 miles per minute
Answer:
x = 800 km/h
y = 200 km/h
the rate of the plane in still air is 800 km/h
and the rate of the wind is 200 km/h
Completed question;
Flying against the wind, an airplane travels 4200 km in 7 hours. Flying with the wind, the same plane travels 4000 km in 4 hours. What is the rate of the plane in still air and what is the rate of the wind?
Step-by-step explanation:
Let x and y represent the rate of the plane and wind respectively;
When flying against the wind, the relative speed is;
Va = x-y .......1
When flying with the wind, the relative speed is;
Vb = x+y .......2
Distance = speed × time
Speed = distance/time
v = d/t
Given;
Flying against the wind, an airplane travels 4200 km in 7 hours. Flying with the wind, the same plane travels 4000 km in 4 hours
When flying against wind;
distance da = 4200 km
time ta = 7 hours
Va = da/ta = 4200/7
Va = 600 km/h
Substituting equation 1
x-y = 600 .....3
When flying with wind;
distance db = 4000 km
Time tb = 4 hours
Vb = db/tb = 4000/4
Vb = 1000 km/h
Substituting equation 2;
x + y = 1000 .....4
Adding equation 3 and 4;
x-y + (x+y) = 600 + 1000
2x = 1600
x = 1600/2
x = 800 km/h
Substituting x = 800 into equation 3;
800 - y = 600
y = 800 - 600
y = 200 km/h
Therefore, the rate of the plane in still air is 800 km/h
and the rate of the wind is 200 km/h.
=(5x+4)°
=(2x-2)°
=(4x-6)°
we know that,
=+
According to the question,
so,
=(4x-6)°=(4×12-6)°=(48-6)°=42°
Answer:
B. The deposit increases by 3% of its current value, compounded monthly.
Step-by-step explanation:
When compounded monthly that means the account is getting more money monthly rather than annually, or each year, so this answer choice would give the best benefit to the account holder. I did this problem on Khan Academy myself and this was the correct answer.