3 years ago

Evaluate the expression 2/5+3/4 / 1/2

1 answer:

8 0

(0.4+0.75)/0.5
Your answer is 2.3

UPDATE
the answer is either 2 (3/10) as a mixed number or 23/10 as an improper fraction

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What is the solution of the following system of equations?<br> 2x + y = -7<br> -3x - 2y = 10

pentagon [3]

Answer:

the solution is (-4, -3)

Step-by-step explanation:

Multiply the first equation by 2. This produces 4x + 2y = -14.

Now combine this result with the second equation:

4x + 2y = -14

-3x - 2y = 10

------------------

x = -4

Subbing -4 for x in the first equation yields 2x - 4 = -7, or 2x = -3.

Then x = -3/2, and the solution is (-4, -3)

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Answer:

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Step-by-step explanation:

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Katherine earned $105.00 at her job when she worked for 7 hours. How much money did she make earn each hour?

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Katherine earned $15 an hour, divide $105 by the seven hours she worked

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3 years ago

which is the rationalized form of the expression the square root of x divided by the square root of x +the square root of 7

Ilya [14]

Answer:

I assume your goal is to rationalize the denominator -

So you need to multiply the denominator by its conjugate.

So we have:

$\frac{\sqrt{x} }{\sqrt{x}-\sqrt{7} } *\frac{\sqrt{x} +\sqrt{7} }{\sqrt{x} +\sqrt{7}}$

$\frac{x-\sqrt{7}\sqrt{x} }{x-7}$

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