One delivery driver can complete a route in 7 h another can do the same route in 11 hours. what equation can the drivers use to determine time t in hours needed to complete the route when they work together?

The equation they can use is

1/T = 1/7 + 1/11

The solution is

T = 4 hours 16 minutes 40 seconds .

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.