Question

Please help me! Thanks

what is the ratio of a to b?

1/2 = a+b/a-b

A. -3

B. -1/2

C. -1/3

D. 3

Answer 1

1=a+b. 2=a-b a= 2+b 1=2+b+b. a=2-1/2=3/2 -1=2b b=-1/2 a/b= (3/2)/(-1/2) = (3/2)(-2/1) =-3

Answer 2

(Cross Multiply)2a+2b=a-b
a=-3b
if b=1; a=-3
correct answer is -3..
Good Luck..