lines with undefined slope are vertical
equation are in form of x constant
through the points ( 3 , -4)
the line is x=3
slope formula : 
a. coordinates : (3,12) and (4,16)



b. coordinates : (1,4) and (3,12)



⇒ A. Yes. Both slopes are equal to 4
Answer:
See below and image
Step-by-step explanation:
180 + 48 = 228
180 + 55 = 235
Answer:
Lowest acceptable score = 121.3
Step-by-step explanation:
Mean test score (μ) = 115
Standard deviation (σ) = 12
The z-score for any given test score 'X' is defined as:
In this situation, the organization is looking for people who scored in the upper 30% range, that is, people at or above the 70-th percentile of the normally distributed scores. At the 70-th percentile, the corresponding z-score is 0.525 (obtained from a z-score table). The minimum score, X, that would enable a candidate to apply for membership is:

X = 17/3 :) :)
add 4 to both sides
then divide both sides by 3