Answer:C
Step-by-step explanation:
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)
Answer: 70%
Step-by-step explanation:
A percentage is a way of writing a fraction, but with a denominator of
100
Asking the question a different way makes it easier to understand.
What percent is
35
shirts out of
50
?
This indicates that there is a fraction.
35
50
Make the denominator
100
35
50
×
2
2
=
70
100
=
70
%
Or to make a percent:
fraction
×
100
%
35
50
×
100
2
%
=
35
×
2
=
70
%
Answer:
since the line is going horizontal the slope is going to be 0