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Karolina [17]
3 years ago
5

Will choose brainliest!

Mathematics
2 answers:
stepladder [879]3 years ago
8 0

Lets set up some variables:

  • 1st envelope: e_{1}
  • 2nd envelope: e_{2}
  • 3rd envelope: e_{3}

Now let us set up some equations based of the facts:

  • e_{1} +2=\frac{e_{2} }{2} -- > e_{2}  = 2e_{1} +4
  • 2e_{3} =e_{1} +e_{2}
  • e_{2} > e_{3} > e_{1}

Now we could try some numbers out since there isn't really any other way I could solve this so far...

 but we do know that the sum of e_{1} and e_{2} must be even since they equal 2e_{3}

After you tried it out for a little bit, when e_{1} = 2, then e_{2} = 8, and e_{3}  = 5. These three values meet the criteria and we have our answer.

Hope that helped!

 

Reil [10]3 years ago
3 0
Dude give the guy above me Brain liest or else
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How do you do this simultaneous equation?
tatiyna
The y is the same for both equations. Equate them
-x - 5 = 2x + 4 Add x to both sides
- 5 = 3x + 4 Subtract 4 from both sides.
- 9 = 3x Divide by 3
x = -9 / 3
x = - 3

y = - x - 5
y = -(-3) - 5
y = - 2

So that point is where the two equations meet.

To see the graph of your question on the internet, go to 
Wolframalpha.com 
and put this string in the question space.
y = -x - 5; y  = 2x + 4  Note the semi colon in the middle.

To the moderator: This is my own work. I'm using Wolfram to get the answer.
5 0
3 years ago
Mercedes would like to have an average of 88 in her math class. There are five assignments with the following grades : 85, 100,
vredina [299]

Answer: 80%

Step-by-step explanation:

To find the average, add all the grades and divide by the number of grades

sum of all grades/number of grades

85 + 100 + 88 + 80 + 95 + x/6

She wants to have an 88, so we can set the expression above equal to 88

448 + x/6= 88

Multiply by 6 on both sides

448 + x = 528

Subtract 448 on both sides

x=80

She needs to score at least an 80 to get an 88 average.

Hope this helped!

3 0
3 years ago
What’s the answer to this questions ?
DochEvi [55]

Answer:

60 degress

Step-by-step explanation:

180-80=120

120/2=60

6 0
3 years ago
A student took a survey of the class. There are 42 students in the class. The student surveyed favorite foods. 10 said hamburger
8_murik_8 [283]

Answer:

52.38%

Step-by-step explanation:

Given that,

Total number of students in the class is 42

Out of 42, 10 like hamburgers, 22 like pizza, 8 like french fries, and 2 like salad.

We need to find the percentage of the class chose pizza. There are 22 student who like to have pizza. Required percentage is given by :

P=\dfrac{22}{42}\times 100\\\\P=52.38\%

So, 52.38% of students chose pizza.

7 0
3 years ago
????????!!!!!!!!!!!!!!????
densk [106]

Answer:

B. 2106 pi mm³

Step-by-step explanation:

the solution is attached,

<h2><u>MARK ME AS BRAINLIST</u> </h2>

8 0
3 years ago
Read 2 more answers
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