16 Feet because 15 divided by 3 is 5 then you add 3+3+5+5
Answer:
r = 225 Mil/h speed of the airplane in still air
Step-by-step explanation:
Then:
d is traveled distance and r the speed of the airplane in still air
so the first equation is for a 4 hours trip
as d = v*t
d = 4 * ( r + 25) (1) the speed of tail wind (25 mil/h)
Second equation the trip back in 5 hours
d = 5 * ( r - 25 ) (2)
So we got a system of two equation and two unknown variables d and
r
We solve it by subtitution
from equation (1) d = 4r + 100
plugging in equation 2
4r + 100 = 5r - 125 ⇒ -r = -225 ⇒ r = 225 Mil/h
And distance is :
d = 4*r + 100 ⇒ d = 4 * ( 225) + 100
d = 900 + 100
d = 1000 miles
Answer:
C. 11 3/4
Step-by-step explanation:
3 + 3 + 2 + 2 = 10
1/4 + 3/4 + 1/4 = 1 1/4
1/2 -> 2/4
2/4 + 1 1/4 = 1 3/4
10 + 1 3/4 = 11 3/4
Explanation is in the file
tinyurl.com/wpazsebu
