They are all not functions
Answer:
c
Step-by-step explanation:
i search it up
Answer:
The system of equations is
Step-by-step explanation:
Let
x ----> the number of minutes of calling time
y ----> the monthly cost of the calling plan
we know that
The linear equation in slope intercept form is equal to
where
m is the slope
b is the y-intercept
In this problem
Plan A
substitute
----> equation A
Plan B
substitute
----> equation B
therefore
The system of equations is
Answer:
About an hour, 56 mins.
Step-by-step explanation:
18+18=36
36+20=56
Voila!