Mathematics, 22.08.2019 11:10 yoyo80431

At 10a. m. juan leaves the city traveling north at 60 mi/hr. one hour later mel leaves the city traveling south at 50 mi/hr. at what time will they be 830 miles apart?

Answers: 2

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Answers

-- At 11 AM, when Mel starts out, Juan has already covered 60 miles.

-- After that, since they're traveling in opposite directions, the distance
between them increases (60 + 50) = 110 miles every hour.

Let's call 'H' the number of hours after 11 AM.
Then the distance between them is

D = 110H + 60

When is this distance 830 miles ? Wouldn't you like to know !

830 = 110H + 60

Subtract 60 from each side:

770 = 110H

Divide each side by 110 :

H = 770 / 110 = 7 .

It happens 7 hours after 11 AM.
That would be 6:00 PM .

Answer from: Frenchfries13

$\frac{60}{1} = \frac{830}{x}$
60x = 830
x = 13.83
10 + 13.83 = 23.83
23.83 hours is around 11:50pm

$\frac{50}{1} = \frac{830}{x}$
50x = 830
x = 16.6
11 + 16.6 = 27.6
27.6 - 24 = 3.6
3.6 is around 1:36am

Answer from: Quest

answer:

payment just for service

→

87.12

payment for service including tax

→

94.09

explanation:

service only with 20% tip

→

72.6

(

100

)

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the

service

−−−−−−

so technically the answer is

→

72.6

(

100

)

87.12

however, the intention of the question provider may have been that your answer is to be

87.12

(

100

)

94.09

to 2 decimal places.

payment just for service

→

87.12

payment for service including tax

→

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge

→

72.60

20% tip

100

72.60

14.52

−−−−−−

←

add

87.12

tax

100

87.12

6.97

−−−−−

←

add

94.09

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