Answer:
13
Step-by-step explanation:
35% = .35
20 • .35 = 7
20 - 7 = 13
Answer: m=n=3
Step-by-step explanation:
Reflecting across the y=0, in other words, the x-axis, means

So, 
This gives us the system

A timer or stop watch or some time of way to record the amount of time
To point plots on a graph, take the following steps:
1. Identify the x-coordinates and y-coordinates from the variable/data you have. It should be written in this form: (x, y)
2. Label both axes on the graph(x-axis and y-axis). The x-axis is usually on the horizontal line while the y axis is the horizontal line.
3. Start plotting your first 2 points on both axes (usually the numbers on first row). Plot the x value and also plot the y value at the appropriate points
4. Finally, Continue plotting the numbers by pointing each point on the graph (take them in rows)