Question

choose
1. if the ordered pairs (a,-1) and (5,b) belongs to {(x,y)/y=2x+3} then a and b are.
a).-13,2
b).2,13
c).2,-13
d).-2,13​

Answer 1

(a,-1)( 5,b). Y=2x+3 Y=2(5)+3 Y=10+3 Y=13 Y=b=13 -1=2x+3 -1-3=2x -4=2x x=-4/2 x=-2 As,x=a=-2 Y=b=13 Answer is (-2,13)