Pick the expression that matches this description:
a trinomial with a leading coefficient of 3 and a constant term of -5

based on context clues you gave i'm assuming the answer would be c.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

40 minutes

step-by-step explanation:

add the time and multiply by 2