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love history [14]

3 years ago

15

15 decreased by twice a number x in algebriac expression

1 answer:

postnew [5]3 years ago

4 0

2x - 15

15 is decreased that is the key word here which indicates subtraction.

twice a number with given variable x is 2x

subtraction always goes behind so 2x - 15

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3 years ago

Read 2 more answers

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>
<u>Divide</u>
<u>Add</u>
<u>Subtract</u>

<u>BODMAS</u>

<u>Brackets</u>
<u>Order</u>
<u>Divide</u>
<u>Add</u>
<u>Subtract</u>

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

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

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

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<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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