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Romashka [77]
3 years ago
7

Alexandra has 78 emails in her box. she deletes 47 emails. How many emails are left in her box? Draw jumps and label the number

line to show your thinking.
I know the answer is 78-47=31 ( but I am having trouble with the jump labeling I know you can draw the line for the bar but can you just write the numbers in a row and I can line jump from there please help asap thanks)

< --------------------------------78--------> this is the jump and label to get the answer
Mathematics
2 answers:
labwork [276]3 years ago
7 0
There are 31 emails left in her box. Hope this helps!! :)
nadezda [96]3 years ago
7 0
There are 31 left in the mailbox
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A dairy needs 336 gallons of milk containing 6% butterfat. How many gallons each of milk containing 7% butterfat and milk contai
Arte-miy333 [17]

We need 84 gallons of 3% butterfat milk and (84 * 3) = 252 gallons of 7% butterfat milk to obtain 336 gallons of 6% butterfat milk.  

<h3>How to work with percentages?</h3>

Let x = number of gallons of 3% milk

Thus;

336 - x = number of gallons of 7% milk

Therefore;

0.03x + 0.07(336 - x) = 0.06(336)

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We need 84 gallons of 3% butterfat milk and (84 * 3) = 252 gallons of 7% butterfat milk to obtain 336 gallons of 6% butterfat milk.  

Read more about Percentages at; brainly.com/question/843074

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4 0
2 years ago
8(13 + 2y)
antoniya [11.8K]
It’s answer C. You multiply 8 & 13, which will give you 104. Then, multiply 8 & 2y, which will also give you 16y.
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Mrs. Higgins's was hoping to make some extra cash, so she invested 12000 in equipment to print yearbooks, each year book cost he
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Answer: im pretty sure it’s the first one

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3 years ago
The population of a town is 15,000. It decreases at a rate of 8% per year. In about how many years
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Answer:

5

Step-by-step explanation:

If a population is decreasing by 8% we can multiply the population by 92% (1-.08)

which means we have the following equation

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we want to know when the population will be 10,000 so we write

10,000=15,000(.92)ⁿ

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a rule we have is

n=y^x\\log_yn=x

which means that

.66667=.92^n\\=log_{.92}.66667

compute this and get

4.867

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