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trasher [3.6K]
3 years ago
13

Worth 30 points. Help a homie out

Mathematics
1 answer:
Sauron [17]3 years ago
8 0

Answer:

Multiply the second equation by -3 to get -3x - 9y = -30.

Step-by-step explanation:

When eliminating, you need to find a term with the negative of that term to combine so that they cancel each other out. An example would be 3x in the first equation and (-3x) in another equation so that when added, it becomes: 3x-3x = 0.

In the second equation, you see that there is already an x there and you just need to make it become (-3x). Thus, you multiply the entire second equation by -3 to make -3x. Once you have done that, you can combine the two equations and eliminate 3x from the first equation.

3x + 5y = 30

-3x - 9y = -30

3x + 5y -3x - 9y = 30 + (-30)

0 - 4y = 30 - 30

-4y = 0

<em>You can find y and then x later on from here. </em>

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Answer:

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Step-by-step explanation:

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What is the sum of 16 quotient of 3
marysya [2.9K]
X + y = 16 (1)
x/y = 3 (2)
-------
x + y = 16 
x = 16 - y
1. Substitute x into equation 2 
16-y/y = 3 
16 - y = 3y 
16 = 4y
y = 4 
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zhenek [66]

Answer:

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Step-by-step explanation:

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SashulF [63]

Answer:

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Step-by-step explanation:

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Colt1911 [192]

Answer:

7/10

51/100

473/1000

27/100

537/1000

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Step-by-step explanation:

im curious about what the dots are in .16.49 and .5.37, why are there two dots?

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