Answer:
y= 3x - 15
Step-by-step explanation:
parallel lines have the same slope, but different y intercepts
Answer: number of blue pen = 128
Number of pen in the box = 320
Step-by-step explanation:
Answer:
you must send 25 msgs to have the same cost
Step-by-step explanation:
x = n of messages
15+ (0.25x ) = 20 + (0.05x)
0.2x = 5
x = 25