Janine determines that the total resistance in her circuit is 80 ohms. Using the inverse equation (r= 120t/ 120-t) modeling the situation, find the resistance of the second lightbulb. The resistance of the second lightbulb is ___ ohms.

a. 300
b. 120
c. 40
d. 240

what is the model?

step-by-step explanation:

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b

true. i hope this ! go answer some of my newest