A summer movie club charges a $30 membership fee and then $5 per movie.
Which equation can be used to find y, the
total cost of the movie club, if x represents
the number of movies watched.

Is B right?

let the number of movies watched be x

and total cost be y

we know,

Total cost = membership cost + cost per movie

=》y = 30 + (5 × x)

=》y = 30 + 5x

=》y = 5x + 30

your correct option is B.

40

Step-by-step explanation:

To find the The resistance of the second lightbulb goes thus:

We use the formula:

t = 120r /r + 20

Since the total resistance in her circuit is 80ohms, this is denoted by t. We would then find r. This would be:

80 = 120r / r + 20

Cross multiply

80(r + 20) = 120r

80r + 1600 = 120r

Collect like terms

120r - 80r = 1600.

40r = 1600.

r = 1600/40

r = 40