A car travels the first 19 km of its journey at an average speed of 57 km/h and the remaining
55 km at an average speed of 110 km/h. Find the
average speed of the car for its entire journey.

88.8km/h

Step-by-step explanation:

Since 19 is a third of 57 we divide 60 minutes  by 3 which is 20 to find how long it took to drive 19 km.

since 55 is half of 110 I divide 60 minute by 2 to find how long it took drive 55 km.

I add the total time i took to drive which is 50 min but i need to convert it to hours so i do 50/60 then i get the total distance driven (19+55)74km. After i get those i divide 74 by .833333333 which is:

74km/.8333333h=88.8

sorry

step-by-step explanation:

sorry, but im pretty sure its a now that i look at it

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168