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r-ruslan [8.4K]
3 years ago
7

Evaluate each function. 1) g(x) = x² + 2x; Find g(2)

Mathematics
1 answer:
zhuklara [117]3 years ago
6 0

Answer:

g=x+2

Step-by-step explanation:

Let's solve for g.

gx=x2+2x

Step 1: Divide both sides by x.

gx/x = x2 +2x / x

<u>g=x+2</u>

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First let's try solving for y since it's easier to start with.

Firstly we have to find an equation for x:

x-2y=2\\x-2y+2y=2+2y\\x=2+2y

Great, now we can use the substitution method to find the value of y using the first equation:

2x+3y=11\\2(2+2y)+3y=11\\4+4y+3y=11\\7y=7\\y=1

Now we know that y=1 we can solve the first equation we made:

x=2+2y\\x=2+2(1)\\x=4

And the answer is x=4 , y= 1\\(4,1)

Double check:

2x+3y=11\\2(4)+3(1)=11\\8+3=11\\11=11\\\\x-2y=2\\(4)-2(1)=2\\2=2

And that's our final answer! (4,1)

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