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Rasek [7]
3 years ago
11

Help!!!!!!!!!!!!!!!!!! (#8)

Mathematics
1 answer:
anastassius [24]3 years ago
4 0
Area of a semicircle  = \frac{ \pi r^2}{2}
r = 7 cm
pi = 3.14

Area = 3.14 * 7^2 / 2
Area = 3.14 * 49 / 2
Area = 153.86 / 2
Area = 76.93 cm^2  <<<<<  Answer
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Multiply.
horrorfan [7]

Answer:

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Step-by-step explanation:

What you do is this.  

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stiv31 [10]

Answer: x=-2 y=2

Step-by-step explanation:

I decided that isolating the y value of the second equation is the best way to start solving.

I divide 3 from both sides to get y= (4-x)/3. With this, I can substitute into the first equation. 4x+3(4-x)/3)=-2.

The multiplying the 3 by the denominator three cancels each other out to make:

4x+4-x=-2.

We subtract 4 on both sides and then subtract x from 4x.

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Now we substitute this into the second equation to solve.

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This becomes 3y=4+2 which is 3y=6

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We end up with x=-2 and y=2.

I hope you learned something :)

4 0
3 years ago
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