Brian drove 120 miles at a speed of 60 mph. he drove the same distance back home at an average speed of 40 mph. brian adds the speeds and divides by two to come up with an average speed of 50 mph what is wrong with his reasoning? find his average speed

4.08%

step-by-step explanation:

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of