Answer:
See below:
Step-by-step explanation:
We can first setup an equation by doing the following:

Whole proccess above!
If you would like an explanation, please let me know so.
Its basically algebra and it's mainly on how you interpret it!
Have a nice day!
Answer:
A (first picture)
Step-by-step explanation:
Based on the picture, the lines are both perpendicular and the red line splits AB into two equal parts (bisects it), so it must represent the perpendicular bisector of AB.
Answer:
44% of the jerseys are medium sized.
Step-by-step explanation:
Total jerseys football team has = 350
Medium-sized jerseys = 154
We need to find what percent of the jerseys are medium-sized jerseys.
The formula used will be: 
Putting values and finding percentage


So, 44% of the jerseys are medium sized.
The answer for this question is going to be: Both x is positive and y is negative.