Question

Answer the following
1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two
variables.

2. Define the term intersecting lines
3. Define perpendicular lines​

Answer 1

Answer:

Let the cost of a notebook be Rs. x and that of a pen be Rs. y.

Given the cost of a notebook is twice the cost of a pen.

Then x=2y

or, x−2y=0.

This is the required linear equation in two variable.

Answer 2

Answer:

Let the cost of a notebook be Rs. x and that of a pen be Rs. y

Given the cost of a notebook is twice the cost of a pen.

Then x is 2y

or, x-2y is 0