Landon is rolling a number cube with the numbers 1-6 . He records the number after each roll If he rolls the cube 50 times , how many times should he expect to roll an odd number ?

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Someone me i need with this stuff

Interpret the following expression (5y^2-7)^3/(2y)^2