Answer:
it would be b
Step-by-step explanation:
Calculator --- $24
Pen --- 24/3 = $8
Money spent --- 24+8 = 32
Total money --- 32 divided by 2 times 3 = $48
Money left --- 48-32 = $16
0.03 i am thinking it is that because is 0.3 out of 10%
So two lines that are parallel will have the same slope, and to calculate the slope you have to use the formula 
CD:
.
JK: 
EF: 
GH:
(undefined)
In short, Lines CD and EF are parallel.
I believe the answer is 3x+5