Activity 4: How Fast Am I? (Speed/Travel Problem) A passenger train can travel, on average, 20 miles per hour faster than a freight train
If the passenger train covers 390 miles in the same time it takes the freight train to cover 270
miles, then how fast is each train?
Solution:
Step 1:
Step 2:
Step 3:
Step 4
Step 5

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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the expected value of the random variable : 0, 1 and 2

step-by-step explanation: