three hours after leaving her best friends house jessica was 400 miles from home. five hours after she left her house she was 280 miles from home. assuming she travels at a constant speed write and equation that represents the distance from home, d(x), as a function of the number of hours spent driving, x.

Okay, like this...let's assume she travels at a constant rate...

Notice that after three hours, she is 400 miles from home, but after TWO hours more she is only 280 miles from home. That tells us that she travels at 120/2 = 60 miles per hour.

So THAT tells us that her friend's house was 3(60) = 180 miles plus the 400, or 580, miles from her house.

Now we have all we need...we write

d(x) = 580 - 60x

Step-by-step explanation:

many reason,

step-by-step explanation:

it is 10.6 according to my calculations