First, you have to make them into decimals to make it easier. 2/8 equals 0.25.
1/5 and 2/10 equal 0.2. 0.2+0.2+0.25 equals 0.65 so if you suppose Jon's money is 1 dollar, he has 35 cents left. In a fraction, 0.35 is 35/100. If you simplify 35/100, it's 7/20.
Answer: Jon has 35/100 or 7/20 or his money left.
I hope it helps!
The first graph (the vertical line) does not represent a function.
Answer:
x = - 15
Step-by-step explanation:
The equation is 
We now cross mulitply and do algebra to figure the value of x (shown below):

Hence x = -15
Given

How to factor
Solution
Step 1
Multiply the first and last costant

Step 2
Write out all the pair factors of -6x^2

Step 3
Check for the pair, such that when you add you will get -x

Step 4
Replace -x with -3x+2x in the equation

Step 5
Put them into brackets Since + is at the center no stress.

Step 6
Factor out what is common in the bracket

Step 7
What is in the bracket are the same, pick one

Hello here is a solution :