Answer:
[-5,5]
Step-by-step explanation:
Answer:
The 100 trees checked for damage
Step-by-step explanation:
Edge 2021 says it correct
Answer:
let cost of each pound of trail mix be x any y respectively
For 2 pounds of trail mix and 5 pounds of jelly beans, the total cost is $10
2x +5y = 10.....(1)
For 8 pounds of trail mix and 3 pounds of jelly beans, the total cost is $23
8x +3y = 23.....(2)
2x +5y= 10 ....... × 4
8x +20y = 40.....(3)
8x +3y = 23 ( from (2))
(3) - (2)
17y = 17
y= 1
8x +3y = 23
8x +3 = 23
8x= 20
x= 2.5
Cost for each pound of trail mix= $2.5
Cost for each pound of jelly beans= $1
Answer:
55p
Step-by-step explanation:
30+25=55 its ....simple addition
Answer:the rate of the plane in still air is 830 km/h
the rate of the wind is 160 km/h
Step-by-step explanation:
Let x represent the speed of the plane in still air.
Let y represent the speed of the wind.
Flying against the wind, an airplane travels 3350 kilometers in 5 hours. It means that the total speed of the airplane would be x - y
Distance = speed × time
Therefore
3350 = 5(x - y)
3350 = 5x - 5y - - - - - - - - - - - - 1
Flying with the wind the same plane travels 7920 in 8 hours. It means that the total speed of the airplane would be x + y
Therefore
3350 = 8(x + y)
7920 = 8x + 8y - - - - - - - - - - - - 2
Multiplying equation 1 by 8 and equation 2 by 5, it becomes
26800 = 40x - 40y
39600 = 40x + 40y
Adding both equations, it becomes
66400 = 80x
x = 66400/80
x = 830
Substituting x = 830 into equation 1, it becomes
3350 = 5 × 830 - 5y
3350 = 4150 - 5y
5y = 4150 - 3350 = 800
y = 800/5 = 160
