Question

Graphically, the pair of equations 7x-y=5;21x-3y=10 represents two lines
which are **​

Answer 1

GIVEN :

The pair of equations are 7x-y=5 and 21x-3y=10

TO FIND :

Graphically, the pair of equations 7x-y=5 and 21x-3y=10 represents which two lines.

SOLUTION :

Given pair of equations are 7x-y=5 and 21x-3y=10

From the given pair of equations are 7x-y=5 and 21x-3y=10 we get that

the 2nd equation 21x-3y=10 can be written as below

3(7x-y)=10

$7x-y=\frac{10}{3}$

Comparing the equations we get that their slopes are equal and never intersect.

Hence they are parallel lines.

∴ the given pair of equations 7x-y=5 and 21x-3y=10 are parallel lines.

Answer 2

Answer:

a¹÷a²=b¹÷b² is not = to c¹÷c² this represents parallel lines

So,

a¹=7,a²=21,b¹=1,b²=3,c¹=5,c²=10

7÷21=1÷3 is not equal to 10÷5 so, this represents parallel lines