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I need help with this problem for my math class.

I need help with this problem for my math class.-example-1
User Kuyenda
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1 Answer

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Answer:

52 minutes

Explanation:

Streaming Haunted Cave videos used the battery at the rate ...

(76% -16%)/(3·30 minutes) = 60%/(90 minutes) = (2/3)% per minute

Playing Top Pop used the battery at the rate ...

(63% -59%)/(24 minutes) = (4/24)% per minute = (1/6)% per minute

The remaining charge (in percent) after x minutes for Jorge's phone will be ...

J = 55 -2/3x

The remaining charge for Samantha's phone will be ...

S = 29 -1/6x

We can find the value of x that makes these equal:

J = S

55 -2/3x = 29 -1/6x

26 = 1/2x . . . . . . . . . . . . . . . add 2/3x -29 to both sides

52 = x . . . . . . . . . . . multiply by 2

It will be 52 minutes before the two phones have the same battery level.

I need help with this problem for my math class.-example-1
User Mario Camilleri
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7.1k points