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konstantin123 [22]
3 years ago
8

Violet buys a premium sound system that is on sale for 40% off the original price. The original price is $224 more than the sale

price
Mathematics
1 answer:
Firdavs [7]3 years ago
7 0

Answer:

The original price was of $560, while the sales price was of 560 - 224 = $336.

Step-by-step explanation:

Original price:

x

Sales price:

224 less than the sales price, that is:

x - 224.

On sale fo 40% of the original price:

So the sales price is 100 - 40 = 60% = 0.6 of the original price. That means that:

x - 224 = 0.6x

0.4x = 224

x = \frac{224}{0.4}

x = 560

The original price was of $560, while the sales price was of 560 - 224 = $336.

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Step-by-step explanation:

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The arithmetic mean (average) of four numbers is 85. If the largest of these numbers is 97, find the mean of the remaining three
Margaret [11]

Answer:

81

Step-by-step explanation:

Let's do this systematically:

Four numbers: a, b, c, d

Whose mean is 85: \frac{a + b + c + d}{4} = 85

Whose largest number is 97: \frac{a + b + c + 97}{4} = 85

Lets solve for the other numbers:

a+b+c+97 = 85*4 = 340

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at this point it doesn't matter what the numbers are, they just need to add up to 243.

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3 0
3 years ago
Please answer this question
elena-14-01-66 [18.8K]
The area of the base (six triangles with a base 15m and a height 7.5√3m):

A_B=6\cdot\dfrac{1}{2}\cdot15\cdot7.5\sqrt3\approx585\ m^2

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A_W=6\cdot\dfrac{1}{2}\cdot15\cdot12=540\ m^2

The surface area:

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Step-by-step explanation:

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