Question

for equations 5x+3y+11= -26 and 2x+4y= -10 find D​

Answer 1

Answer:

D=|5 3|

|2. 4|

=(5×4)-(3×2)

=20-6

D=14

Answer 2

2x+3y=11..(i)

2x−4y−−24...(ii)

Subtracting equation 2 from 1 will get

⇒7y=35

⇒y=5

now Substituting y in eq 1

⇒2x+15=11

⇒2x=11−15

⇒2x=−4

⇒x=−2

In question given

y=mx+3

Now substituting x and y values in eq will get

⇒5=−2m+3

⇒2m=3−5

⇒m=−1

answer

hope it helps you