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Phantasy [73]
3 years ago
6

5x + 9x if x =3 solve this expressioon

Mathematics
1 answer:
RSB [31]3 years ago
3 0
The answer is actually 42. Not 20.

You replace each x with 3

5(3)+9(3)

That 3 right next to the five means you multiply not add.

15+27=42

Brainliest my answer if it helps you out?
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PLEASE HELP WILL MARK BRAINLIEST!!
Gre4nikov [31]

Answer:

Explanation below.

Step-by-step explanation:

1. a. \sqrt{x} =12

  b. \sqrt{x} ^{2}=12^{2}

  c. x=144

2. a. \sqrt{x^{2} } =\sqrt{196}

   b. x= 14

3.  

\sqrt{x} -4 +4= 8+4\\\sqrt{x} =12\\x= 3.46410161514  \\or  \\2\sqrt{3}

4.

2(x^{2} +3)=398\\x^{2} +3= 199\\x^{2} =196\\x=14

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