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blondinia [14]
3 years ago
7

Can you please help meeee

Mathematics
1 answer:
Sidana [21]3 years ago
5 0
3. y=5x+1
y=3x+5
5x+1=3x+5
5x-3x=5-1
2x=4
x=2

4.y=3x-5
3x-2y=4
2y=6x-10
2y=3x-4
6x-10=3x-4
6x-3x=-4+10
3x=6
x=2

5.3x-y=13
2x+3y=16
3x-y=13
2x+3y=16
y=3x-13
3y=16-2x
3y=9x-39
3y=16-2x
9x-39=16-2x
9x+2x=16+39
11x=55
x=11


Hope i helped ❤️
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Answer:

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Step-by-step explanation:

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3 years ago
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2) Evaluate the given numerical expression.<br><br> A) 9<br> B) 12<br> C) 14<br> D) 21
eduard

Answer:

  • \boxed{\sf{14}}

Step-by-step explanation:

\boxed{\underline{\text{ORDER OF OPERATIONS:}}}

Use the order of operations.

Note: PEMDAS or BODMAS stands for:

<u>PEMDAS</u>

  • <u>Parentheses</u>
  • <u>Exponents</u>
  • <u>Multiply</u>
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  • <u>Subtract</u>

<u>BODMAS</u>

  • <u>Brackets</u>
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<u>First, do parentheses.</u>

3+6*(5+4)÷3-7

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\Longrightarrow: \sf{3+6* 9\div 3-7}

<u>Do multiply and divide.</u>

6*9=54

54/3=18

<u>Then, rewrite the problem down.</u>

\Longrightarrow: \sf{3+18-7}

<u>Add.</u>

\sf{3+18=21}

\sf{21-7=\boxed{\sf{14}}

\Longrightarrow: \boxed{\sf{14}}

  • <u>Therefore, the correct answer is "C. 14".</u>

I hope this helps, let me know if you have any questions.

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