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Klio2033 [76]
3 years ago
7

Salma purchased a prepaid phone card for $15 Long distance calls cost 6 cents a minute using this card. Salma used her card only

once to make a long distance call. If the remaining credit on her card is $13.14 how many minutes did her call last?
Mathematics
1 answer:
Fiesta28 [93]3 years ago
6 0

Answer:

m=17

Step-by-step explanation:

$15 minus $0.14(# minutes) = $12.62

 

15 - .14m = 12.62

 

.14m = 15 - 12.62

 

.14m = 2.38

 

m = 2.38/.14

 

m = 17 minutes

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olganol [36]

Answer:

vertex is (4,-4) and another point is (6,0) or you could use (2,0) or many other options :)

Step-by-step explanation:

The cool thing about this question your quadratic is in factored form so your x-intercepts are easy to figure out, they are 2 and 6.

So you can plot (6,0) and (2,0).

The vertex will lie half between x=2 and x=6... so it lays at (6+2)/2=4

We just have to find the y-coordinate for when x=4.

Plug in 4 gives you (4-2)(4-6)=(2)(-2)=-4.

So the vertex is at (4,-4).

5 0
3 years ago
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Alexxandr [17]

Answer:

4th graph

6th graph

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Step-by-step explanation:

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it is 4th graph

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for negative values of x it is nearly almost touches zero

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Step-by-step explanation:

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