Answer: 500 feet in 5 minutes
Step-by-step explanation:
Multiply 100 times 5 to find out how much feet the hot air balloon descends per minute.
2+3=8, 3+7=27, 4+5=32, 5+8=60, 6+7=72, 7+8=???????? SOLVE IT IF YOU CAN
b. Solve the system of equations for the speed of the airplane in still air.
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
b)x-3
c)2x-3
d)2x+3
Answer:
The answer is A.Cos 57.
Step-by-step explanation:
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