Well, basically what they are trying to do is isolate the y variable on the left side of the equation in order to get it in slope-intercept form (y=mx+b where "m" equals the slope and "b" is the y-intercept). So, in order to do this they have to do the inverse operations (so if it's adding they subtract, and if it's multiplying they divide.) Anyways, they do this with the intention of getting only the variable "y" on the left side of the equal sign. Once they did all that they got it in slope intercept form, and they know that the coefficient in front of the variable x is the slope.
Answer:
3.2x + 0.8y ≤ 50
Step-by-step explanation:
Mr. Ishimoto ordered math books and workbooks for his class.
Weight of each math book = 3.2 pounds
number of math books ordered = x
so, total weight of math books = 3.2x
Weight of each workbook = 0.8 pounds
number of workbooks ordered = y
so, total weight of workbooks = 0.8y
Since the total weight of the box of books cannot be more than 50 pounds, the equation would be
3.2x + 0.8y ≤ 50
K<4
that should be the answer to your question
The y-intercept is at the point (0, -3)
