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max2010maxim [7]
3 years ago
7

What is 8x - 7 + 12x after being simplified?

Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
8 0
20x should be your answer
Vinvika [58]3 years ago
3 0

Answer:

8x - 7 + 12x after being simplified would be 20x - 7

Step-by-step explanation:

Add 8x and 12<em>x</em>.

8 + 12 = 20<em>x</em>

20<em>x</em> - 7 would be your answer.

Hope this helps!

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3 years ago
11 POINTS PLZ HELP EMERGENCY
Bad White [126]

Part A

The given expression is:

(-5(1+2i)+3i(3-4i)

We expand to get:

-5-10i+9i-12i^2

Note that i^2=-1

12-5-10i+9i

-5-10i+9i+12

7-i

Part Bi)

The given expression is;

\sqrt{-50}

We simplify to get:

\sqrt{25\times 2\times -1}

\sqrt{25\times} \sqr{2}\times \sqrt{-1}

Note that:

\sqrt{-1}=i

5\sqr{2}i

This is now of the form a+bi, where a=0,b=5\sqr{2}.

This explains why it is a complex number;

Part bii)

The given expression is :

\frac{\sqrt{-50} }{\sqrt{5}}

We simplify to get

\sqrt{\frac{-50 }{5}}

\sqrt{-25}

\sqrt{-25}=\sqrt{25}\times \sqrt{-1}

\sqrt{-25}=5\times i

\sqrt{-25}=5i

Part C

We want to simplify:

i^{22}

We rewrite in terms of i^2

i^{22}=(i^2)^{11}

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3 years ago
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Answer:

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