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Sidana [21]
2 years ago
8

What is the first step in solving the following system of equations?

Mathematics
1 answer:
Gelneren [198K]2 years ago
8 0

Answer:

B

Step-by-step explanation:

its b solve the first equation for y \

hope this helps

brainliest would be appreciated

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Let f(x) = x - 2 and g(x) = x2 - 7x - 9. Find f(g(-1))
Montano1993 [528]
f(x)=x-2 \\
g(x)=x^2-7x-9 \\ \\
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f(g(-1))=f(-1)=-1-2=-3 \\ \\
\boxed{f(g(-1))=-3}
4 0
3 years ago
What is the coefficient of x7 in the expansion of (1 + x)11?
eduard
You can choose to expand the equation to find the coefficient of x7 but that would take a lot of time. Here is a useful tactic that can help; 

11C(something)(1)(x)⁷ ----> This gives the coefficient of x⁷
11C7(1)⁴(x)⁷ ----> You know that pascal's triangle is equal on both sides 
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330x1⁴=330 

This means that the coefficient of x⁷ is 330. You can double check by expanding the equation. If you do not understand what I did there, you can ask me how I got to the solution. 

Hope I helped :) 
4 0
3 years ago
Help please!?!?!?! :CCC
Ksju [112]

Answer:

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Step-by-step explanation:

5 0
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Answer:

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Step-by-step explanation:

brainliest if you want :)

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Which quadratic function is represented by the graph?
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Step-by-step explanation:

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