Math, asked by umeshsh4670, 2 months ago

Find the value of “k” for which 7k ÷ 7-4 = 75.​

Answers

Answered by maralsarthak1834
1

Step-by-step explanation:

Consider the given equations.

2x+3y=7

(k−1)x+(k+2)y=3k

The general equations

a

1

x+b

1

y=c

1

a

2

x+b

2

y=c

2

So,

a

1

=2,b

1

=3,c

1

=7

a

2

=k−1,b

2

=k+2,c

2

=3k

We know that the condition of infinite solution

a

2

a

1

=

b

2

b

1

=

c

2

c

1

Therefore,

k−1

2

=

k+2

3

=

3k

7

k−1

2

=

k+2

3

⇒2k+4=3k−3

⇒k=7

Hence, the value of k is 7.

Answered by lakshya0910
0

Answer:

Ramesh was sitting at a railway station. There, he saw a coolie, who was carrying

heavy luggage on his head. Ramesh watched him from a distance and reaches to help

him out. He helped the coolie in placing the luggage at its place. The coolie thanked

Ramesh for his kindness. Ramesh asked him to be careful in future.

(i) What work was done by the coolie on the luggage from Physics point of view?

(ii) Which values are displayed by Ramesh?

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