If A and B are the points (5,3) and (15,-7) respectively. Find the coordinates of the point which divides AB externally in the ratio 3:1

Can someone me do math because i am having a breakdown rn because i don’t get it

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is