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faust18 [17]
4 years ago
14

jerry has 60 coins consisting of quarters and dimes. The coins combined value is $9.45. Find out how are quarters and how many a

re dimes.
Mathematics
1 answer:
jekas [21]4 years ago
7 0
Eq. 1 .10x + .25y = 9.45
Eq. 2 x + y = 60 rewrite as x = 60 - y and substitute into equation 1.

.10(60 - y) + .25y = 9.45
6 - .1y + .25y = 9.45
6 + .15y = 9.45
.15y = 3.45
y = 23
60 - 23 = 37

23 quarters
37 dimes


23* .25 = 5.75
37 * .1 = 3.70
5.75 + 3.70 =9.45
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7 0
4 years ago
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lesantik [10]

Answer:

Step-by-step explanation:

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The error range such that the error range is most reliable in the study is:

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8 0
3 years ago
What is 3/10 - 1/2?​
Galina-37 [17]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
−8y2−9y)+(8y3+9y2−2y)=
Alik [6]

Combine like terms:

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8y³ (- 8y² + 9y²) (- 9y - 2y)

8y³ + y² - 11y


8y³ + y² - 11y is your answer

~

3 0
4 years ago
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Mark estimates that the distance from his house to to his school is 15.5 mi the actual distance is 14.5 mi to the nearest tenth
Kryger [21]
So the distance that he is off by is 1 mile. The question is what percent of 14.5, 1 is. 
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6.9%
8 0
4 years ago
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