For a saturday matinee, adult tickets cost $5.50 and kids under 12 pay only $4.00. if 90 tickets are sold for a total of $435, how many of the tickets were adult tickets and how many were sold to kids under 12?

y=mx+b

step-by-step explanation:

m slope, b y-intercept

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:

sounds & other waves originate from any vibrating object