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Anuta_ua [19.1K]
3 years ago
15

Martina purchased a prepaid phone card for $20. long distance calls cost 13 cents a minute using this card. Martina used her car

d only once to make a long distance call. If the remaining credit on her card is 17.92, how many minutes did her call last?
Mathematics
2 answers:
Arte-miy333 [17]3 years ago
8 0
The call lasted 16 mins, i used trial and error and the came across 16x.13=2.08 and then you add 17.92 plus 2.08 and that gives you 20
Dima020 [189]3 years ago
7 0
Phone card = $20 
You need to minus 17.92 from 20 = $2.08 
$2.08 / 0.13 = how many minutes 
= 16
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Joseph's uncle wants to put shingles on the outside walls and solar panel the roof of his barn shown at the right. It costs $2.5
sp2606 [1]

Answer:

The answer is below

Step-by-step explanation:

From the image attached, the measurement of the roof is 5 m by 9 m on  both sides. Hence:

Area of roof = 2 (5 * 9) = 90 m²

Since solar panels cost $4.00 per square meter, therefore:

Cost of solar panels = $4.00 per square meter * 90 m² = $360

The area of the front wall of the barn = (8 m * 7 m) + (1/2 * 8 m * 3 m) - (4 m * 4 m) = 52 m²

The area of the back wall of the barn = (8 m * 7 m) + (1/2 * 8 m * 3 m) = 68 m²

Area of each side wall of barn = 9 m * 7 m = 63 m²

Total area of wall = 52 m² + 68 m² + (2 * 63 m²) = 246 m²

Cost of shingles = $2.50 for each square meter * 246 m² = $615

Total cost of project = $615 + $360 = $975

5 0
3 years ago
What is 2.35 rounded to the nearest hundredth.
Sloan [31]

2.35 is already rounded to the nearest hundredth.

6 0
2 years ago
The perimeter of a rectangular garden is 38 feet. If the length is 5 feet longer than the width, find the width of the
son4ous [18]

Answer:

Step-by-step explanation:

L and W are the length and width of the garden, respectively.

perimeter = 2L+2W = 38 ft

L+W = 19

the length is 5 ft longer than the width

L = W+5

substitution

(W+5)+W = 19

2W+5  = 19

W = 7

4 0
3 years ago
If you roll a die what is the probability of rolling a 2 or 6?
Vinil7 [7]

Answer:

\frac{2}{6}

Step-by-step explanation:

We have that, a die is rolled once.

As, the total outcomes can be 1, 2, 3, 4, 5, 6.

So, the probability to obtain 2 is \frac{1}{6} and the probability to obtain 6 is \frac{1}{6}.

Thus, the probability of rolling 2 or 6 after rolling a die once will be \frac{1}{6}+\frac{1}{6} i.e. \frac{2}{6}.

Hence, the probability of rolling a 2 or 6 is \frac{2}{6}.

5 0
3 years ago
Read 2 more answers
Help me please thanks!
Degger [83]

Answer:

x=28/3 or 9 1/3

Step-by-step explanation:

triangle ABC is equal to triangle ADE by HL. you can solve this by setting up a proportion so for the sides its CB/ED=AB/AD. then just plug in the side lengths, cross multiply and youre done

7/13=x/8+x

56+7x=13x

56=6x

56/6=x

28/3=x

5 0
2 years ago
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