The probability is 0.0334.
We will first find the probability that none of the 30 people sampled are infected. Since the probability of one person being infected is 0.00114, the probability that someone is not infected is 1-0.00114 = 0.99886. The probability that none of the 30 people are infected would be (0.99886)^30 = 0.966359. We subtract this from one to find the probability that at least one person is infected:
1 - 0.966359 = 0.0334.
The y-intercept of the graph is 0
<span>
(4w^2-3w+8) + (3w^2+9w+5) - (-8w^2+7w+3)
=</span><span>4w^2- 3w+ 8 + 3w^2+ 9w+ 5 + 8w^2 - 7w - 3
=15</span>w^2 - w + 10
hope it helps
Subtract 7x on both sides of the equal sign (it'll cancel out) then -3=-3 which makes a true statement.