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kaheart [24]
3 years ago
12

Estimate the solution of the system x+y=4 2x-y=6 by sketching a graph of each linear function. Then solve the system algebraical

ly. Use your estimate to judge the reasonableness of your solution. The estimated solution is The algebraic solution is The solution is/is not reasonable because​
Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
8 0

Answer:

(10/3, 2/3)

Step-by-step explanation:

You may find it easier to write these two equations x+y=4 2x-y=6 in a column:

x+y=4

2x-y=6

Adding these together will eliminate y:

3x = 10.  Then x = 10/3.

Substituting 10/3 for x in the first equation results in:

10/3 + y = 4

Clear fractions by multiplying all three terms by 3:

10 + 3y = 12

Then 3y = 2, and y = 2/3.

The solution is (10/3, 2/3)

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Therefore, the bones were 6612.5 years old at the time they were discovered.

<h3><u>Half life</u></h3>

Given that the radioactive element​ carbon-14 has a​ half-life of 5750 years, and a scientist determined that the bones from a mastodon had lost 57.5​% of their​ carbon-14, to determine how old were the bones at the time they were discovered, the following calculation must be made:

  • 50 = 5750
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Therefore, the bones were 6612.5 years old at the time they were discovered.

Learn more about half life in brainly.com/question/24710827

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2 years ago
You just obtained a credit card. You immediately purchase a stereo system for $200. your credit limit is $1000. Let's assume tha
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Step-by-step explanation:

7 0
3 years ago
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If ∠4 = 98°, then ∠3 = ?<br> look at image
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Step-by-step explanation:

∠4 = ∠1 & ∠2 = ∠3

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The math club makes 35 bars of laundry soap a week and sells these at $20 each before the soap could be sold , the pupils found
Svet_ta [14]

Answer:

Step-by-step explanation:

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140 - 6 = 134 bars

Therefore, the total sale at the end of a four week month would be

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7 0
3 years ago
Find the volume of a cylinder made by rotating a rectangle with a width of 2.5 feet and a length of 8 feet as shown in the figur
asambeis [7]

<span>the question does not present the picture, but this does not interfere with the resolution</span>

we know that
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the answer is
157 ft³
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3 years ago
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