Trieste’s descent was a change in depth of -3 feet per second. We can use the relationship = −3 to model this, where is the depth (in feet) and is the time (in seconds). Using this model, how much time would the Trieste take to reach the bottom?

b or 2, just plug these equations into your graphing calculator then check the graph to see the image. if it matches up then that's your answer!

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.