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lukranit [14]
3 years ago
7

A man loses 20 percent by selling an article for 11. What was the cost price of the article

Mathematics
1 answer:
dlinn [17]3 years ago
3 0

Answer:

11.2

Step-by-step explanation:

Because

x-20%=11

x-0.2=11

x=11.2

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3+17 =20

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3 years ago
Read 2 more answers
See the ​attached file.
Masja [62]

f(x) = 4x - x^2

1)

f(4) = 4(4) - 4^2 = 16 - 16 = 0

f(-4) = 4(-4) - (-4)^2 = -16 - 16 = -32

f(4) - f(-4) = 0 - (-32) = 32

2)

f(3/2) = 4(3/2) - (3/2)^2

f(3/2) = 6 - 9/4 = 15/4

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f(x + h) = 4(x + h) - (x + h)^2

= 4x + 4h -(x^2 + 2xh + h^2)

= 4x + 4h -x^2 - 2xh - h^2

f(x - h) = 4(x - h) - (x - h)^2

= 4x - 4h -(x^2 - 2xh + h^2)

= 4x - 4h -x^2 + 2xh - h^2

So

[f(x + h) -f(x - h) ] / 2h

= [4x + 4h -x^2 - 2xh - h^2 - ( 4x - 4h -x^2 + 2xh - h^2 )] / 2h

=( 4x + 4h -x^2 - 2xh - h^2 - 4x + 4h + x^2 - 2xh + h^2 ) / 2h

= (8h - 4xh) / 2h

= 2h(4 -2x) / 2h

= 4 - 2x

Answer: [f(x + h) -f(x - h) ] / 2h = 4 - 2x

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2 years ago
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Just ignore that bot. The actual answer would be y = 1/4X - 2!

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Another question (picture)
ASHA 777 [7]


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Third choice



8 0
3 years ago
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Studentka2010 [4]

Answer:

A) x=2

Step-by-step explanation:

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