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umka21 [38]
3 years ago
10

How do you SOLVE SYSTEMS OF LINEAR EQUATIONS BY SUBSTITUTION!!!!!!

Mathematics
1 answer:
Digiron [165]3 years ago
6 0
Ex: y=2x+4     <span>3x+y=9   <--Simply plug y into the second equation here and solve for x. When you find the solution for x, you can plug the solution to x into the 2nd equation to find y....Hope this helps!!!</span>
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What is greatest common factor of 175 and 280
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The GCF of 175 and 280 is 35.

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What is the measure of an interior angle of a regular 360-gon
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The sum of any 360-gon's interior angles is 64440 degrees.

Step-by-step explanation:

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Solve for r<br> 2r = 7/10
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Answer:

7/20

Step-by-step explanation:

given,

2r = 7/10

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If I buy a stereo for $245 and this includes GST of 10%, what is the pre-GST price?
Ivan

Answer:  $222.73

===========================================

Work Shown:

x = pre-GST price

10% of x = 0.10x = tax amount

x + 0.10x = 1.10x = post-GST price = 245

1.10x = 245

x = 245/1.10

x = 222.7272 approximately

x = 222.73 is the price before tax.

------------

Check:

10% of 222.73 = 0.10*222.73 = 22.273 = 22.27

The tax amount ($22.27) is added to the pre-GST price to get

22.27+222.73 = 245

which matches the post-GST price mentioned.

The answer is confirmed.

Or another way to confirm the answer is to calculate this

1.10*222.73 = 245.003 = 245

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Step-by-step explanation:

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