Answer:
x = 5m/s
Step-by-step explanation:
Distance flying out = 12 km (headwind)
Distance flying back = 12 km (tailwind)
total distance = 12 + 12 =24 km
wind speed = 1km/h
speed going out (with headwind) = (x - 1) km/h
speed coming back (with tailwind) = (x + 1) km/h
Time taken to go out = distance going out / speed going out
= 12 / (x-1)
Time taken to come back = distance coming back / speed coming back
= 12 / (x+1)
total time = time taken to go out + time taken to come back
5 =[ 12/(x-1) ] + [ 12/(x-1)]
expanding this, we will get
5x² - 24x - 5 = 0
solving quadratic equation, we will get
x = -1/5 (impossible because speed cannot be negative)
or
x = 5 (answer)
180 degress because a stranight angle equals that
Answer:
1 1/3
Step-by-step explanation:
1/3 divided by 1/4 =
1/3 x 4/1 = 4/3
1 1/3
Answer:
option c
Step-by-step explanation:
a guitar 15% off means that the cost is now 85%
now the 8% of 170 is
so the total cost is
170+13.6
183.6
