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Tom [10]
3 years ago
10

There are 480 jellybeans in an 8-ounce jar. How many jellybeans are there per ounce in the jar?

Mathematics
2 answers:
Volgvan3 years ago
8 0

For this case, what we must do is divide the total amount of jellybeans by the total number of ounces.

For this, we use the following equation:

r = \frac {amount\ of\ jellybeans} {number\ of\ ounces}

Substituting values:

r = \frac {480} {8}\\r = 60

Answer:

There are 60 jellybeans per ounce in the jar.

Option 3

Alja [10]3 years ago
7 0
The answer would be 60. This is because 480/8=60. 
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Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a
Alina [70]

Given:

30-hour review course average a score of 620 on that exam.

70-hour review course average a score of 749.

To find:

The linear equation which fits this data, and use this equation to predict an average score for persons taking a 57-hour review course.

Solution:

Let x be the number of hours of review course and y be the average score on that exam.

30-hour review course average a score of 620 on that exam. So, the linear function passes through the point (30,620).

70-hour review course average a score of 749. So, the linear function passes through the point (70,749).

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y-620=\dfrac{129}{40}(x)-\dfrac{387}{4}

Adding 620 on both sides, we get

y=\dfrac{129}{40}x-\dfrac{387}{4}+620

y=\dfrac{129}{40}x+\dfrac{2480-387}{4}

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We need to find the y-value for x=57.

y=\dfrac{129}{40}(57)+\dfrac{2093}{4}

y=183.825+523.25

y=707.075

y\approx 707.1

Therefore, the required linear equation for the given situation is y=\dfrac{129}{40}x+\dfrac{2093}{4} and the average score for persons taking a 57-hour review course is 707.1.

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kirza4 [7]

Answer:

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