Answer:
the second one
Step-by-step explanation:
proportion used: 7/20
7emails were from the same person
35/100= 7/20
7/20 of 20
20/20=1
1x7= 7
2x²+7x+3=0
2x²+(1+6)x+3=0
2x²+1x+6x+3=0
x(2x+1)+3(2x+1)=0
(2x+1)(x+3)=0
2x+1=0. x+3=0
2x=-1. x=-3
x=-1/2
