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DaniilM [7]
4 years ago
10

a student has some $1 and $5 bills in his wallet. he has a total of 15 bills that ar worth $47. how much of each type of bill do

es he have
Mathematics
1 answer:
Karolina [17]4 years ago
4 0

Answer:

a = 7 ($1)

b = 8 ($5)

Step-by-step explanation:

a + b = 15 | (-)

1a + 5b = 47

- a - b = - 15

a + 5b = 47

------------------ +

-a + a - b + 5b = - 15 + 47

4b = 32

b = 32 : 4

b = 8

a = 15 - 8 = 7

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These Questions are confused me a lot help if you could I really appreciate it thank you
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For the first problem, understand that you are solving for the area of a circle. The equation for the area of a circle is pi r². By using the leash length as the radius (r), you can get the answer. (The leash length is 3 meters long.)

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It would have about 28.27 meters² of playable space.

<h3>Question 2:</h3>

For the second problem, it would be much the same as to the first question. There is the same objective to find the area of the circle. Along with that, it gives us a length to work with. This time it is the sprinkler's reach, which would be the radius, or "r" in the equation.

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