Acute angle W has sin W=285 and sec W=859. Which are values of csc W and cos W?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?