Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at 90 miles per hour. The westbound train travels at 80 miles per hour. How long will it take for the two trains to be 408 miles
apart?
Do not do any rounding.

x = # of hours

80x + 90x = 408

Combine like terms.

170x = 408

Divide both sides by 408

x = 2.4 hours

It will take the trains 2.4 hours to be 408 miles apart.

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.

35-60 students are taking math.