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mariarad [96]
3 years ago
14

10. Plane A is flying at an altitude of 5000 feet. It starts descending (going down) at a rate of 100 feet per minute. Plane B i

s flying at an altitude of 4100 feet. It starts ascending (going up) at a rate of 50 feet per minute. If the planes start changing altitude at the same time, how many minutes until they are flying at the same altitude?​
Mathematics
1 answer:
lakkis [162]3 years ago
8 0

It takes 6 minutes until they are flying at the same altitude..

Since Plane A is flying at an altitude of 5000 feet. It starts descending (going down) at a rate of 100 feet per minute, in time t, it descends a distance of 100t.

So, its distance from its original altitude is d = 5000 - 100t. (negative since it is descending)

Also, Plane B is flying at an altitude of 4100 feet. It starts ascending (going up) at a rate of 50 feet per minute. In time t, it ascends a distance of 50t.

So, its distance from its original altitude is D = 4100 + 50t. (positive since it is ascending)

So, to find the time the planes are flying at the same altitude, d = D

So, 5000 - 100t = 4100 + 50t

So, 5000 - 4100 = 100t + 50t

900 = 150t

dividing through by 150, we have

t = 900/150

t = 6 minutes

So, it takes 6 minutes until they are flying at the same altitude.

Learn more about plane altitude here:

brainly.com/question/13763638

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Triangle FGH with vertices F(6,6), G(8,8), and H(8,3): (a) Reflection: in the line x = 5 (b) Translation: (x,y)→ (x - 7, y - 9)
irakobra [83]

(a) The vertices after the reflection in the line x = 5 are F'(4,6) , G'(2,8) , H'(2,3) .

and (b) after translation , the vertices are F''(-1,-3) , G'' (1,-1) , H''(1,-6) .

In the question a triangle FGH with vertices F(6,6) , G(8,8) and H(8,3) is given

Part (a)

the rule for reflection of point (x,y) by the line x = p  is

(x,y) → (2×p - x , y)

reflection by the line x = 5 ,

we get

the vertices as

F'(2×5-6,6) = (4,6)

G'(2×5-8,8) = (2,8)

H'(2×5 - 8 ,3) = (2,3)

Part (b)

the rule of translation is given as (x,y)→ (x - 7, y - 9)

So , the vertices after translation are

F''(6-7 , 6-9) = (-1,-3)

G''(8-7,8-9) = (1,-1)

H''(8-7,3-9) = (1,-6)

Therefore , (a) The vertices after the reflection in the line x = 5 are F'(4,6)

G'(2,8) , H'(2,3) .

and (b) after translation , the vertices are F''(-1,-3) , G'' (1,-1) , H''(1,-6) .

Learn more about Translation here

brainly.com/question/3456459

#SPJ1

7 0
1 year ago
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