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Furkat [3]
2 years ago
11

Solve system of equation using elimination by addition. Will give brainliest!!

Mathematics
1 answer:
emmasim [6.3K]2 years ago
8 0

Answer:

x = 2, y = -1

Step-by-step explanation:

We can add the 2 equations together to solve for y.

(-3x + 5y) + (3x + 7y) = (-11) + (-1)\\-3x + 3x + 5y + 7y = -11 -1\\12y = -12\\y = -1

Now we can solve for x by substituting y in one of the original equations.

3x + 7y = -1\\3x + 7(-1) = -1\\3x - 7 = -1\\3x = 6\\x = 2

Those are the answers

- Kan Academy Advanced

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mia hired a moving company, it charged 500$ for service mia give them a 16% tip.How much did she tip the movers,
snow_tiger [21]

Answer: 80 dollars

Step-by-step explanation:

You can find a percentage with one of two ways.

For hundreds like this, oftentimes it's quicker and more simple to think of it as just 100. The proportion from 100 to 500 is just 5.  16% of 100 is 16. So, multiply 16 * 5. You would get 80.

The second method is you can use 0.16 * 500. It's the more conventional method, and you get 80, like the last method.

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3 years ago
CAN YOU ADD 2 TO PI TO GET A RATIONAL NUMBER
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6 0
3 years ago
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Goshia [24]

Answer:

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7 0
3 years ago
Explain how solving an equation with several variables is similar to and different from the
matrenka [14]

Answer:

Step-by-step explanation:

To solve an equation for a particular variable, we can perform the same actions we did when solving equations that only had one variable. We can add the same number to both sides, multiply both sides by the same number, etc.

4 0
3 years ago
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Sergeeva-Olga [200]

Answer:

\frac{x^2}{1316^2}+\frac{y^2}{1669^2}=1

Step-by-step explanation:

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