Why can't I see my messages on here? Like it says somebody sent something but it appears blank. I'm worried it might be an answer or something

X-intercept=-5 y-intercept=2 the equation of the line is

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?