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jeka94
3 years ago
9

What was the original price if: after increasing by 60% it became $8a?

Mathematics
2 answers:
mr Goodwill [35]3 years ago
7 0

Answer:

5a

Step-by-step explanation:

We can make a mathematical equation with the information obtained:

<em>final value = initial value * (1 + percentage)</em>

So, if we want to know the <em>inicial value, </em>what we have to do is clear it.

So:

initial value = \frac{final value}{1+percentage}

So, in this case:

initial value=\frac{8a}{1+0.60} = \frac{8a}{1.6}=5a

Morgarella [4.7K]3 years ago
3 0
I think it’s 5......I think
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Step-by-step explanation:

8 0
3 years ago
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Which expression is equivalent to (r Superscript negative 7 Baseline) Superscript 6? r Superscript 42 StartFraction 1 Over r Sup
vodomira [7]

Power rule of exponents says that the power of the power of a exponent is equal to the multiplying both the powers. The expression which is equal to the given expression is,

\dfrac{1}{(r)^{42}}

The option B is the correct option.

Given information-

The given expression in the problem is,

[(r)^{-7}]^5

<h3>Power rule of exponents</h3>

Power rule of exponents says that the power of the power of a exponent is equal to the multiplying both the powers.

Suppose<em> </em><em>x</em> is a number with power <em>a. </em>The power is power of the power of number <em>x. </em>Then by the power rule of the exponents,

(x^a)^b=x^{ab}

Using the power rule of the exponents given expression can be written as,

[(r)^{-7}]^6=(r)^{-7\times 6} &#10;

[(r)^{-7}]^6=(r)^{-42}

<h3>Negative exponents rule</h3>

Negative exponents rule says that when a power of a number is negative, then write the number in the denominator with the same power with positive sign.Thus,

[(r)^{-7}]^6=\dfrac{1}{(r)^{42}}

Hence the expression which is equal to the given expression is,

\dfrac{1}{(r)^{42}}

The option B is the correct option.

Learn more about the power rule of exponents here;

brainly.com/question/819893

8 0
2 years ago
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A rectangle has a perimeter of 196 meters and a length of 50 meters.What is the width of the rectangle? Explain.
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we already know that one side is 50 m, so since it's a
rectangle you can multiply 50 by 2 which gives you 100. Know you have two sides left (which would be the same number) . You can do it easy and subtract 196 and 100 which gives you 96. Then, divide 96 by 2 and you get 48.

---- check: do 48(2)+50(2) it will give you 196


HOPE THIS HELPED

3 0
3 years ago
Mrs. Olga’s credit card charges an interest rate of 19% compounded annually. If her current balance is $250, what will her balan
SOVA2 [1]

Answer:

$421.30

Yearly Componded Interest

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$297.50 * 19% = $56.53 = $354.03 <-- Year Two Balance  

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