Math, asked by prabhu77, 12 hours ago

Findxsuchthat : –2/5=8/x a)20 b)–20 c)2 d)–2​

Answers

Answered by Radhaisback2434
0

Step-by-step explanation:

b)–20 is the answer

Hope its help..

Answered by yashrajgupta95
10

Answer:

Correct option is

A

8

11

B

8

3

Given,

A(6,3),B(−3,5),C(4,−2)andD(x,3x)

By using area of triangle =

2

1

∣x

1

(y

2

−y

3

)+x

2

(y

3

−y

2

)+x

3

(y

1

−y

2

)∣

Area of ΔDBC =

2

(x)(5+2)+(−3)(−2−3x)+4(3x−5)

=

2

7x+6+9x+12x−20

=

2

28x−14

Area of ΔABC =

2

(6)(5+2)+(−3)(−2−3)+4(3−5)

=

2

42+15−8

=

2

49

Given:

AreaofABC

AreaofDBC

=

2

1

2

49

2

28x−14

=

2

1

∣28x14∣=

2

49

28x14=±

2

49

Taking a positive sign

28x14=

2

49

56x−28=49

56x=77

x=

56

77

=

8

11

Taking a negative sign

28x14=−

2

49

56x−28=−49

56x=−21

x=

56

21

=

8

3

So, x=

8

11

or x=

8

3

Similar questions