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miv72 [106K]
3 years ago
11

The local sports shop has backpacks on sale for $28. The original price was $40. What is the percent decrease for the backpack p

rice?
Mathematics
1 answer:
emmainna [20.7K]3 years ago
5 0
30%. 40-28 =12. 12/40 =30%
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Answer:

Number of box seats = 1000

Number of lower deck seats = 5000

Number of upper deck seats = 4000

Step-by-step explanation:

Let number of box seats = x

Let number of lower deck seats = y

Let number of upper deck seats = z

As per question statement:

x+y+z=10000 ...... (1)

Cost for box seat = $10

Cost for x box seats = 10x

Cost for lower deck seat = $8

Cost for y lower deck seats = 8y

Cost for lower deck seat = $5

Cost for z lower deck seats = 5z

As per question statement:

10x+8y+5z=70000 ..... (2)

z = 4x ..... (3)

Putting value of y in (1) and (2):

x+y+4x=10000\\\Rightarrow 5x+y=10000 ....... (4)

10x+8 y+5\times 4x=70000\\\Rightarrow 30x+8y=70000 ..... (5)

8 \times (4) - (5):

10x =10000

\Rightarrow x = 1000

By (3):

z = 4000

Now, by equation (1):

y = 5000

Number of box seats = 1000

Number of lower deck seats = 5000

Number of upper deck seats = 4000

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3 years ago
Differentiation of x raised to the power of x
Eduardwww [97]

Answer:

{x}^{x} (1 +  log(x))

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Answer:

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Step-by-step explanation:

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lys-0071 [83]

Answer

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