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3 years ago

Find the original price of a pair of shoes if the sale price is $84 after a 30% discount.

Mathematics

2 answers:

lyudmila [28]3 years ago

7 0

Answer:

<h2>Original price = $ 120</h2>

Step-by-step explanation:

To find the original price given the new price and percentage discount we use the formula

$original \: \: price = \frac{100}{(100 - x)} \times new \: \: price \\$

where

x is the percentage discount

From the question

new price = $ 84

% discount = 30%

Substitute the values into the above formula and solve

That's

$original \: \: price = \frac{100}{100 - 30} \times 84 \\ = \frac{100}{70} \times 84 \\ = \frac{10}{7} \times 84 \\ = 12 \times 10$

We have the final answer as

<h3>Original price = $ 120</h3>

Hope this helps you

bearhunter [10]3 years ago

5 0

Answer:

Step-by-step explanation:

84*0.30= $25.2

84+ 25.2 = $109.2

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Suppose you have opened some Nutty Bars to check the company’s claim of an “average” of 8 peanuts per bar. Here is what you foun

user100 [1]

The company should use the median to support their claims.

<h3>Which measure of average should the company use?</h3>

Measures of average commonly used are mean and median.

Mean is the sum of the numbers divided by the total number

Mean : (5 + 6 + 6 + 6 + 7 + 8 + 8 + 8 + 8 + 11) / 10 = 7.3

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Median = 8

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1 year ago

Geometry Help Please!!

Reil [10]

Answer:

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Step-by-step explanation:

b=180°-50°=130°

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3 years ago

Read 2 more answers

PLEASE HELP!! Thank you!!!!

SVEN [57.7K]

Answer:

The answer to your question is

Step-by-step explanation:

Data

4x - 8y = -16 ------------ (I)

x - 2y = - 8 ------------ (II)

a) Solve equation II for x

x = 2y - 8

Substitute x in equation I

4(2y - 8) - 8y = -16

8y - 32 - 8y = -16

8y - 8y = 32 - 16

0 = 16 The system has no solution because y was

cancelled.

b) When a system of equations do not have solution means that the lines are parallels and different.

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3 years ago

Question 4 options:

andrew11 [14]

I. The value of x is equal to 8.

II. The dimensions of the rectangle are 13 and 5 inches respectively.

<u>Given the following data:</u>

Area of a rectangle = 65 square inches.

Length of rectangle = x + 5 inches

Width of rectangle = x - 3 inches

To find the value of x, and the dimensions of the rectangle:

Mathematically, the area of a rectangle is given by the formula:

$A = LW$

Substituting the values, we have:

$65 = (x+5)(x-3)\\\\65=x^2-3x+5x-15\\\\65=x^2+2x-15-65\\\\x^2 +2x-80=0\\\\x^2 +10x-8x-80=0\\\\x(x+10)-8(x+10)=0\\\\(x-8)(x+10)=0$

x = 8 or x = -10

<u>For the</u><u> length:</u>

when x = 8

$Length = 8 +5$

Length = 13 inches.

<u>For the</u><u> width:</u>

when x = 8

$Length = 8 -3$

Length = 5 inches.

Find more information: brainly.com/question/11037225

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2 years ago

Determine the decibel values of thermal noise power (N) and thermal noise power density (No) given the following: T=292 degrees

Agata [3.3K]

Answer: d. None of the above are correct.

Step-by-step explanation: Noise is a superfluous random alteration in an eletrical signal. There are different types of noises created by different devices and process. Thermal noise is one of them. It is unavoidable because is created by the agitation of the charge carriers, due to temperature, inside an eletrical conductor at equilibrium and is present in all eletrical circuits.

The formula to find the thermal noise power (N) is: N = $k_{b}$ .T.B, where:

$k_{b}$ is Boltzmann constant (1.38. $10^{-23}$ J/K);

T is temperature in Kelvin;

B is the bandwith;

Calculating the thermal noise power:

N = 1.38. $10^{-23}$ ·292·40

N = 16118.4. $10^{-23}$ dBm

The thermal noise power [N] = 16118.4. $10^{-23}$ dBm

Noise power density or simply Noise density (N₀) is the noise power per unit of bandwith and its SI is watts per hertz.

For thermal noise, N₀ = kT, where

<em>k </em>is the Boltzmann constant in J/K;

T is the receiver system noise temperature in K;

N₀ = 1.38. $10^{-23}$ . 292

N₀ = 402.96. $10^{-23}$ W/Hz

The thermal noise power density [N₀] = 402.96. $10^{-23}$ W/Hz

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3 years ago