What is the resultant of a and b if a = -2i - 5j and b= i - 4j?

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.