Answer:
Speed of plane in still air: 490 mile/hour
speed of wind: 70 mile/hour
Step-by-step explanation:
still speed = x wind speed = w
with wind: speed = still + wind
(x+w) * 3 = 1680 ...a
against wind: speed = still - wind
(x-w) * 4 = 1680 ...b
b-a ... 4x-4w-3x-3w = 0
x-7w = 0
x = 7w
substitution: (7w+w)*3 = 1680 8w = 560 wind speed (w) = 70
still speed (x) = 7w = 490 mile/hour
Answer: blank=2/3
Step-by-step explanation:
1/2/3+x/2x1/2
solve this then answer
Answer:
1/6
Step-by-step explanation:
Its a 1/6 chance it lands on the one u want
The first one is 5
Second 3
Third -7
Fourth is 9
And fifth is 10
