Answer:
c = 2m + 20
Step-by-step explanation:
Before anything, let's make sure our variables are defined:
Movie = M
Cost = C
A way to think about this is because we're looking for C and our M value is changing, C = y and M = x. That would make 20 = b, making this C = 3M + 20. (This may or may not make sense, so if it doesn't, just ignore this.)
Ok so the first thing to note is that this is for <u>one month</u>. What does that mean? That means, our $20 monthly fee never changes. It happens once in the equation. So whatever we have, we add $20 to it, once.
The second thing to note is that we don't know how many movies are being rented. But! We already have a variable m for how many movies are being charged. So to find the number of movies, we find $3 * m, or $3m.
Finally, we know how much the monthly fee is and we know how much the movies are, so we add those together to find the total cost:
c = 3m + 20
*Note: Your grader may or may not want $ signs next to each number. It is doubtful they would, and I've never seen it, but just in case, your actual answer would be: $(c = 2m + 20)
