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Schach [20]
3 years ago
6

Please simplify this problem:

Mathematics
1 answer:
joja [24]3 years ago
5 0

Answer:

-52/75

Step-by-step explanation:

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A jar that contains quarters and dimes is worth $7.15. If there are a total of 40 coins,
kherson [118]

Answer:

21 quarters and 19 dimes

Step-by-step explanation:

Create a system of equations where q is the number of quarters and d is the number of dimes.

0.25q + 0.1d = 7.15

q + d = 40

Solve by elimination by multiplying the bottom equation by -0.25

0.25q + 0.1d = 7.15

-0.25q - 0.25d = -10

Add them together and solve for d:

-0.15d = -2.85

d = 19

Then, plug in 19 as d into the second equation to solve for q:

q + d = 40

q + 19 = 40

q = 21

So, there are 21 quarters and 19 dimes

7 0
3 years ago
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What is the value of r in the equation 4r − 8 = 5r + 12?<br><br> −20<br> −1<br> 1<br> 20
Readme [11.4K]
The answer is -20. if you move all of the numbers with r to the right and all of the numbers without r to the left, you get r = -20.
3 0
3 years ago
Read 2 more answers
Please please help please please ASAP
Aloiza [94]

Answer:

12√2, 12√2

Step-by-step explanation:

For x:

We have the hypotenuse and are trying to find the angle opposite to 45 degrees. Using sine = opposite / hypotenuse we get sin45=x/24 so x = 24sin45 = 24 * √2/2 = 12√2

Beacuse the angle is 45 degrees we know that the the missing angle is also 45 degrees (180 - 90 - 45 = 45) so x and y must be the same (the triangle is isosceles) so y is also 12√2

7 0
2 years ago
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If you have the fraction 8/25, and you are trying to turn it into a decimal, which of the following would be helpful?
AysviL [449]
In this situation you will need to do 8 divided by 25 which will give the answer 0.32.
8 0
3 years ago
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This is it guys thx!✨
Tanzania [10]

Answer:

It's D: 16

Step-by-step explanation:

6 0
3 years ago
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