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musickatia [10]
2 years ago
9

Paul spent $13 on writing utensils. Pens cost $3 each and pencils cost $1 each. If he bought a total of 7, how many of each did

he buy?
Mathematics
2 answers:
Zolol [24]2 years ago
7 0
3 pens and 4 pencils.
$3x3=$9
$1x4=$4
$9+$4=$13
dem82 [27]2 years ago
3 0
The answer is 3 pens and 4 pencils. Hope this helps
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Answer:

Step-by-step explanation:

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Assume that all six outcomes of a six-sided number cube have the same probability. What is the theoretical probability of each r
Margarita [4]
Hey there! I am on the same one. :) I will help you out a little. 

<span>Assume that all six outcomes of a six-sided number cube have the same probability. What is the theoretical probability of each roll? 
• 1: 1/6
• 2: 2/6
• 3: 3/6
• 4: 4/6
• 5: 5/6
• 6: 6/6
</span>
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How many results of 1 did you have? __2____________ How many results of 2 did you have? ____4__________ How many results of 3 did you have? ____5__________ How many results of 4 did you have? ______5________ How many results of 5 did you have? ______4________  How many results of 6 did you have? ______5________
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<span>
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</span><span>Have a lovely day! Cheerio. :) </span></span> </span> </span></span>
8 0
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An environmental science teacher at a high school with a large population of students wanted to estimate the proportion of stude
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Answer:

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Step-by-step explanation:

The confidence interval of a proportion is given by:

p\pm z*\sqrt{\frac{p*(1-p)}{n} }

Where 'p' is the proportion of students who responded 'yes', 'z' is the z-score for a 95% confidence interval (which is known to be 1.960), and 'n' is the number of students in the sample.

If the confidence interval is from 0.584 to 0.816, then:

p=\frac{0.584+0.816}{2}=0.7 \\0.816-0.584=2*(1.96*\sqrt{\frac{p*(1-p)}{n}}) \\0.116=1.96*\sqrt{\frac{0.7*(1-0.7)}{n}}\\n=16.8966^2*(0.7*0.3)\\n=60\ students

60 students were in the sample.

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ankoles [38]

Answer:

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Step-by-step explanation:

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Answer:

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