You are going on a road trip! you drive to your best friend's house and then get on the highway. after 2.5 hours, you had traveled a total of 135 miles. you can average 50 miles per hour after you leave your friend's house.

Answer with explanation:

Total Distance traveled in 2.5 hours = 135 miles

Average speed for the total trip

Let time taken by person while going from his house to his friend house = t hours

Average Speed of person after  leaving the friend's house.  = 50 miles/hour

Let average speed of person while going from his house to his friend house =v miles/hour.

Also, Distance = Speed × Time

→135 = 58 × t +50 × (2.5 -t)

→135 = 58 t +125 - 50 t

→135 - 125 =8 t

→ 10 = 8 t

So, i traveled at a speed of 58 miles /hour, for 75 minutes ,from my house to my friend's House in the entire trip.

25.2

step-by-step explanation:

2+4x6-8/10= 25.2

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0