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almond37 [142]
3 years ago
12

An item went from 40 to 30. what is the percent discount

Mathematics
1 answer:
Sedaia [141]3 years ago
3 0
Old Price = 40
New Price = 30

Discount = old price - new price
Discount = 40 - 30
Discount = 10

Percentage discount = discount/original x 100
Percentage discount = 10/40 x 100 
Percentage discount = 25%

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Answer: 25%
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An equivalent expression with a rational denominator is...
Whitepunk [10]

Given the expression,

(8x-56x^2)/(\sqrt{14x-2})

We will have to rationalize the denominator first. To rationalize the denominator we have to multiply the numerator and denominator both by the square root part of the denominator.

[(8x-56x^2)(\sqrt{14x-2})]/[(\sqrt{14x-2})(\sqrt{14x-2})]

If we have (\sqrt{a})(\sqrt{a}), we will get \sqrt{a^2} by multiplying them. And \sqrt{a^2} = a.

So here in the problem, we will get,

[(8x-56x^2)(\sqrt{14x-2})]/(14x-2)

Now in the numerator we have (8x-56x^2). We can check 8x is common there. we will take out -8x from it, we will get,

-8x(-1+7x)

-8x(7x-1)

And in the denominator we have 14x-2. We can check 2 is common there. If we take out 2 from it we will get,

2(7x-1)

So we can write the expression as

[(-8x)(7x-1)(\sqrt{14x-2})]/[2(7x-1)]

(7x-1) is common to the numerator and denominator both, if we cancel it we will get,

(-8x)(\sqrt{14x-2})/2

We can divide -8 by the denominator, as -8 os divisible by 2. By dividing them we will get,

(-4x)(\sqrt{14x-2})

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So we have got the required answer here.

The correct option is the last one.

4 0
3 years ago
What kind of transformation converts the graph of f(x) = 10x + 71 - 2 into the graph of
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Answer:

A transition down six units

Step-by-step explanation:

-2-6=-8

8 0
3 years ago
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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Angelo runs 7 miles per week and increases his distance by 1 mile each week. Marc runs 4 miles per week and increases his distan
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Answer:

Step-by-step explanation:

You have to set each runner's plan equal to each other because they are equal in the end. You start with 7 miles for Angelo and 4 miles for Marc.

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Marc = Angelo

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In 3 weeks each runner will run 10 miles for the week.

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3 years ago
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