PART 1.
Going westward:
Distance: 2400 miles
Rate (this is speed): (450-wind_speed) mph
Time: distance / speed = 2400 / (450-wind speed)
Going eastward:
Distance: 2400 miles
Rate (this is speed): (450+wind_speed) mph
Time: distance / speed = 2400 / (450+wind speed)
PART 2
Formula for speed:
speed = distance / time
Now we solve this for time:
time = distance / speed
11h = 2400 / (450+-wind_speed)
+- sign is put because in one case wind increases speed of plane and in other case it decreases speed.
PART 3
To solve for wind_speed we start by rearranging formula so that we have wind_speed on left side:
(450+-wind_speed) = 2400 / 11
(450+-wind_speed) = 218mph
To fly this distance in 11h speed of plane must be 218mph.
The only way to get this solution is if we substract wind speed:
450-wind_speed = 218
wind_speed = 450-218 = 232mph
Answer: there is no awnser
Step-by-step explanation: because u can’t divide 7.25 and 7
Answer:
0.37
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given that,
Perpendicular = 49 ft
Base = 22 ft
We need to find the angle of elevation of the sun. It can be calculated using trigonometry as follows :

So, the required angle of elevation is
.
Answer:
3/35
Step-by-step explanation:
to solve this expression 1⁄5 × 4⁄7 × 3⁄4
solution
1⁄5 × 4⁄7 × 3⁄4
= 1 x 4 x 3/5 x 7 x 4
= 12/140
= 6/70
= 3/35