Hey can you help me fast!!

Put the equation in slope intercept form by solving for y

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.