Question

Without drawing the graph, find out whether the lines representing the following pair of linear equations intersect at a point, are parallel or coincident:
$9x -10y =21$ \atop
$\frac{3}{2}x -\frac{5}{3} y=\frac{7}{2}$

Answer 1

Answer:

Step-by-step explanation:

9÷3/2=6

10÷5/3=6

21÷7/2=6

Here a1=9, a=3/2, b1=10, b2=5/3, c1=21, c2=7/2

Since a1÷a2=b1÷b2=c1÷c2,

The lines are coincident.

Hope it helps you.

Answer 2

hi.........

$9 \div 3 \div 2 = 6 \\10 \div 5 \div 2 = 6 \\ 21 \div 7 \div 2 = 6$
so from here came to know that all values are equal.
so,

a/a'=b/b'=c/c'

6=6=6
so , it is coincide with each other