3x/5= -6 me i need to know this problem for my homework

The number of chocolate chips in an​ 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. ​(a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate​ chips, inclusive? ​(b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate​ chips? ​(c) what proportion of bags contains more than 1225 chocolate​ chips? ​(d) what is the percentile rank of a bag that contains 1425 chocolate​ chips?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Point r divides in the ratio 1 : 3. if the x-coordinate of r is -1 and the x-coordinate of p is -3, what is the x-coordinate of q? a. b. 3 c. 5 d. 6 e. -9