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8090 [49]
3 years ago
11

Help needed.......................

Mathematics
2 answers:
VladimirAG [237]3 years ago
8 0
C is the answer ... all u has to do was subtract 5 from 12 , then -11-14 , then -13-9
zhenek [66]3 years ago
7 0

Answer: 7x^2+3y^2-4x

Choose the first option

Step-by-step explanation:

Ok, so let me show you how to do this.

First, distrubute the negative sign

12x^2-11y^2-13x-(5x^2-14y^2-9x)=

12x^2-11y^2-13x-5x^2+14y^2+9x

Now combine like terms

(12x^2-5x^2)=7x^2

(-11y^2+14y^2)=3y^2

(-13x+9x)=-4x

7x^2+3y^2-4x is the answer.

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nalin [4]
<span>=<span><span><span><span><span>(3)</span><span>(x)</span></span>+<span><span>(3)</span><span>(4)</span></span></span>+<span><span>(2)</span><span>(<span>5x</span>)</span></span></span>+<span><span>(2)</span><span>(2)
</span></span></span></span><span>=<span><span><span><span>3x</span>+12</span>+<span>10x</span></span>+<span>4
</span></span></span><span>=<span><span><span><span>3x</span>+12</span>+<span>10x</span></span>+4
</span></span><span>=<span><span>(<span><span>3x</span>+<span>10x</span></span>)</span>+<span>(<span>12+4</span>)
</span></span></span><span>=<span><span>13x</span>+<span>16

Answer = </span></span></span><span>13x</span>+<span>16
(hope this helps)</span>
4 0
3 years ago
Can somebody please explain question (i) and (ii) to me​
yuradex [85]
<h2>♨ANSWER♥</h2>

hey buddy, if u attach your question to this we can help you to find an answer for your question.

<u>☆</u><u>.</u><u>.</u><u>.</u><u>hope this helps</u><u>.</u><u>.</u><u>.</u><u>☆</u>

_♡_<em>mashi</em>_♡_

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7. Two people enter a whispering gallery t want to know where they should stand so they can hear other people whisper. The galle
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Answer: Just get closer

Step-by-step explanation:

Walk next to someone to hear them left foot right foot towards them.

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Step-by-step explanation:

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