A boat moves 36 km to the west and the water current was 4 km h -1. The to-and-fro journey took 6 hours. Find the velocity of the boat, in kmh-1, if the boat maintained its uniform velocity.​

Find two consexutive odd integers such that the sum of their square is 650

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

Acontainer holds 0.7 liters of oil and vinegar. 3/4 of the mixture is vinegar. how many liters of oil are in the container? express your answer as both a fraction and a decimal.