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Anna11 [10]
3 years ago
8

30% of what number is 275

Mathematics
2 answers:
yawa3891 [41]3 years ago
8 0

Answer:

Step-by-step explanation:

x 30%

— = ———

275 100

You can use the butterfly method which combines by multiplication

x*100=100x

Then multiply 275*30

It equals to 8250

Them divide each problem by 100 to get x by itself and the final answer

It makes 30% of 275

82.5

Kipish [7]3 years ago
4 0

Answer:

around 917

Step-by-step explanation:

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Step-by-step explanation:

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Which line shows the first error in the solution?
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<h3>Answer:</h3>

The first line.

<h3>Step-by-step explanation:</h3>

If we let x represent "a number", then "a number divided by 3" is x/3. The denominator is missing on the first line.

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_____

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What is the correct order of operations for simplifying the expression (x+3)^2-(x^2+9)/2x^2?
kramer

Answer:

The given expression is simplified as \frac{(x+3)^2-(x^2 +9)} {2x^2}  = \frac{3}{x}

Step-by-step explanation:

Here, the given expression is:

\frac{(x+3)^2-(x^2 +9)} {2x^2}

Now, with ALGEBRAIC IDENTITIES:

(a+b)^2  = a^2 + b^2 + 2ab

Now, similarly: (x+3)^2  = x^2 + (3)^2 + 2x(3)   = (x^2  + 9 + 6x)

Now, substituting the values in the given expression, we get:

\frac{(x+3)^2-(x^2 +9)} {2x^2} \implies \frac{(x^2  + 9 + 6x)-(x^2 +9)} {2x^2}\\=  \frac{(x^2  + 9 + 6x-x^2  -9)} {2x^2} \\=  \frac{ 6x} {2x^2}  = \frac{3}{x}

Hence, the given expression \frac{(x+3)^2-(x^2 +9)} {2x^2}  = \frac{3}{x}

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3 years ago
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